Kungfu math p4 slide2 (multiplication)
•Download as PPTX, PDF•
1 like•550 views
The document discusses multiplication of whole numbers. It provides examples of multiplying a 4-digit number by a 1-digit number by multiplying each digit separately and then adding the results. Examples are also given of multiplying a 3-digit number by a 2-digit number by first multiplying the 3-digit number by the ones place of the 2-digit number, adding a zero, and then multiplying the 3-digit number by the tens place and adding the results. The document encourages practicing these multiplication methods with example problems provided.
Report
Share
Report
Share
Recommended
Magical methods
The document provides methods for calculating squares, multiplication, division, and cube roots through "magical" shortcut formulas. For squares, it explains a formula where the number is written with a slash and the right digit of the number plus one is multiplied by the left digit. For multiplication, it describes a method where the right digits of the product are obtained by multiplying the right digits of the numbers, and the left digits by adding one to the top left digit and multiplying by the bottom left digit. Similar shortcut formulas are described for long division where the denominator ends in 9 and finding cube roots based on the last digits of perfect cubes.
Chapter 1.1
This document provides an overview of whole number operations including adding, subtracting, multiplying, and dividing whole numbers. It defines key vocabulary terms related to whole numbers and each operation. It then provides examples of how to perform each operation by showing the step-by-step work and checking the answers. The examples include adding baseball card collections, subtracting test scores, multiplying guitar lesson costs by weeks, and finding the total number of apples from boxes containing a certain amount.
Algebra Foundations Series- 1.2 Order of Operations
Pearson Algebra I Foundations 1-2 Part 1. Vocabulary: power, exponent, base, simplify.
Includes focus questions and examples.
Chapter 1.2
1) The document provides examples and instructions for estimating sums, differences, products, and quotients with whole numbers by rounding to place values.
2) It demonstrates estimating the total distance traveled by rounding numbers to the nearest ten before adding and estimating apples left by rounding to the nearest ten before subtracting.
3) For products, it advises rounding both numbers to the place value of their leading digits before multiplying and uses rounding the divisor to its leading digit as an example of estimating quotients.
Multiplication and division_rules
Multiplication and division are opposites. Multiplication involves grouping numbers, while division involves sharing numbers into groups. Some key rules are: multiplying by 0 equals 0; multiplying by 1 equals the original number; multiplying by 2 is doubling the number; dividing by 2 is halving the number; and multiplying by 10 moves the digits left and adds a 0.
Speed mathematics
Speed mathematics provides techniques to solve problems faster without extensive calculation. Some key methods described in the document include:
- Squaring numbers ending in 5 by multiplying the previous digit by one more than itself and adding the product of the last digits.
- Multiplying numbers by 9s or 1s by subtracting or adding to the digits from 9 or 1 respectively and placing the answer left to right.
- Mental calculation techniques like breaking numbers into place values to add, subtract or multiply mentally.
- The criss-cross system to multiply multi-digit numbers by working through place values vertically and cross-wise in steps.
division
Division is the process of splitting a quantity into equal parts or groups. The amount being divided is called the dividend, while the number it is being divided by is the divisor. To perform division, the divisor is subtracted from the dividend repeatedly until the remainder is zero. The number of times the divisor is subtracted is the quotient. Common word problems involving division use language like "share", "each", and "equal groups". Strategies for solving division problems include repeated addition, repeated subtraction, writing the division as a symbol, or drawing pictures to represent sharing into groups.
Playing with numbers
The document discusses various divisibility rules that can help determine if a number is divisible by certain integers without using long division. It provides the rules for divisibility by 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. For each rule, it gives the criteria for divisibility and examples showing how to apply the rule. The rules allow quick checks of divisibility rather than calculating the full division.
Recommended
Magical methods
The document provides methods for calculating squares, multiplication, division, and cube roots through "magical" shortcut formulas. For squares, it explains a formula where the number is written with a slash and the right digit of the number plus one is multiplied by the left digit. For multiplication, it describes a method where the right digits of the product are obtained by multiplying the right digits of the numbers, and the left digits by adding one to the top left digit and multiplying by the bottom left digit. Similar shortcut formulas are described for long division where the denominator ends in 9 and finding cube roots based on the last digits of perfect cubes.
Chapter 1.1
This document provides an overview of whole number operations including adding, subtracting, multiplying, and dividing whole numbers. It defines key vocabulary terms related to whole numbers and each operation. It then provides examples of how to perform each operation by showing the step-by-step work and checking the answers. The examples include adding baseball card collections, subtracting test scores, multiplying guitar lesson costs by weeks, and finding the total number of apples from boxes containing a certain amount.
Algebra Foundations Series- 1.2 Order of Operations
Pearson Algebra I Foundations 1-2 Part 1. Vocabulary: power, exponent, base, simplify.
Includes focus questions and examples.
Chapter 1.2
1) The document provides examples and instructions for estimating sums, differences, products, and quotients with whole numbers by rounding to place values.
2) It demonstrates estimating the total distance traveled by rounding numbers to the nearest ten before adding and estimating apples left by rounding to the nearest ten before subtracting.
3) For products, it advises rounding both numbers to the place value of their leading digits before multiplying and uses rounding the divisor to its leading digit as an example of estimating quotients.
Multiplication and division_rules
Multiplication and division are opposites. Multiplication involves grouping numbers, while division involves sharing numbers into groups. Some key rules are: multiplying by 0 equals 0; multiplying by 1 equals the original number; multiplying by 2 is doubling the number; dividing by 2 is halving the number; and multiplying by 10 moves the digits left and adds a 0.
Speed mathematics
Speed mathematics provides techniques to solve problems faster without extensive calculation. Some key methods described in the document include:
- Squaring numbers ending in 5 by multiplying the previous digit by one more than itself and adding the product of the last digits.
- Multiplying numbers by 9s or 1s by subtracting or adding to the digits from 9 or 1 respectively and placing the answer left to right.
- Mental calculation techniques like breaking numbers into place values to add, subtract or multiply mentally.
- The criss-cross system to multiply multi-digit numbers by working through place values vertically and cross-wise in steps.
division
Division is the process of splitting a quantity into equal parts or groups. The amount being divided is called the dividend, while the number it is being divided by is the divisor. To perform division, the divisor is subtracted from the dividend repeatedly until the remainder is zero. The number of times the divisor is subtracted is the quotient. Common word problems involving division use language like "share", "each", and "equal groups". Strategies for solving division problems include repeated addition, repeated subtraction, writing the division as a symbol, or drawing pictures to represent sharing into groups.
Playing with numbers
The document discusses various divisibility rules that can help determine if a number is divisible by certain integers without using long division. It provides the rules for divisibility by 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. For each rule, it gives the criteria for divisibility and examples showing how to apply the rule. The rules allow quick checks of divisibility rather than calculating the full division.
Multiply three by two digits
The document provides step-by-step instructions for multiplying 3-digit numbers by 2-digit numbers. It emphasizes the importance of keeping numbers aligned and shows an example problem worked out step-by-step, arriving at the solution of 125 x 54 = 6,750. It then prompts the reader to try two additional practice problems on their own.
Day 15 two step inequalities
This document provides examples and instructions for solving two-step inequalities. It begins with a warm up quiz on basic math skills. It then asks students to identify the previous knowledge needed to solve an inequality like 2y - 3 ≤ -5. Students are instructed to write a step-by-step guide for solving similar inequalities. The bulk of the document provides 7 examples of two-step inequalities for students to solve, with space below each for their work. It concludes by asking students to explain why inequalities have solution sets.
Divide
This document provides instructions for dividing multi-digit numbers by one-digit divisors using the "family method". It explains the parts of a division problem and the steps to solve it. The family method involves finding the closest multiple (Father), multiplying it by the divisor (Mother), subtracting (Sister), and bringing down the next digit (Brother). Examples are provided to demonstrate solving a full division problem using this step-by-step method. Students are assigned practice problems to reinforce the technique.
Long division intro
This document provides step-by-step instructions for solving long division problems. It explains that you take the divisor and repeatedly subtract it from the dividend, grouping the numbers in the quotient. For example, if dividing 36,987 by 5, you would find that 5 goes into 36 seven times, with a remainder carried to the next group. Carrying out this process reveals the full quotient is 7,397 with a remainder of 2. The document also includes examples of setting up word problems as division calculations.
Multiplying by two-and three times one-digit
The document provides step-by-step instructions for multiplying two- and three-digit numbers by a one-digit number. It explains that the process involves multiplying the ones place values first, carrying values to the next place if needed, and then multiplying each subsequent place value while accounting for any carried values. Two examples are shown working through multiplying 45 by 5 and 364 by 4 to arrive at the final answers of 225 and 1,456 respectively.
Factorsprimessquare (1)
This document discusses factors and prime numbers. It provides examples of finding all the factors of different numbers like 10, 8, 20, 36. It explains that a number is prime if it only has two factors - 1 and itself. It also introduces the concept of square numbers and uses factors to demonstrate different ways to multiply numbers like 12 x 4 x 3. In the end, it shows another method to find the factors of 26 x 6 by writing them out horizontally.
Multiply Two-Digit Numbers
This document provides instructions for multiplying two-digit numbers by two-digit numbers in 5 steps:
1) Multiply the ones place of the first number by the ones place of the second number.
2) Multiply the ones place of the first number by the tens place of the second number and add any carries.
3) Repeat for the tens place of the first number.
4) Add the partial products together.
5) The sum is the total product of the multiplication problem.
Amazing Math Tips & Tricks
This document presents several math tricks for operations like squaring two-digit numbers ending in 5, multiplying numbers by 4, 5, 11, 15, and dividing numbers. It explains tricks for squaring numbers like 35 by multiplying the first digit by the next number and adding 25. For multiplication, it offers tricks like doubling a number twice to multiply by 4, or halving and multiplying by 10 to multiply by 5. Divisibility checks are also explained for numbers like 11 by alternating addition and subtraction of digits. Practice of the tricks is recommended to master them. In the end, the reader is challenged to add a series of numbers as a math trick, but mistakenly answers 5000 instead of the correct answer of 4100.
Math 'e' Magic
Mathemagic is inspired from Vedic Mathematics and Smart Maths to develope a passion for quantitative section of various entrance exams especially for those who belongs to non mathematic streams.
Wednesdayweek2
Okay, let's break this down step-by-step:
* The population is dropping at a rate of 255 people per year
* We want to know how long it will take for the change in population to be 2,040 people
* So we set up an equation: Rate x Time = Change
* Rate is -255 people/year
* Change is -2,040 people
* So the equation is: -255x = -2,040
* Solve for x: x = 2,040/-255 = 8 years
Therefore, it will take 8 years for the change in population to be 2,040 people.
Day 15 two step inequalities
This document provides instructions and examples for solving two-step inequalities. It begins with a do now section asking students to solve and graph basic inequalities like 7 < x + 3. It then provides an anticipatory set with questions to activate prior knowledge on solving inequalities. The main body walks through solving seven sample inequalities step-by-step. It concludes by reminding students that inequalities have solution sets and asking them to explain why in a sentence. For homework, it assigns practice problems from the textbook.
Dividing Numbers (web-based)
The document provides instructions for teaching students about division. It defines division as sharing objects equally or grouping objects. It gives examples of writing division number sentences and using multiplication to check the answer. It includes word problems and activities to help students practice dividing by 5, 6, and 9. Students are shown divisibility rules to determine if a number is divisible by 5, 6, or 9.
Amazing Maths Trick
This document provides several math tricks and puzzles that involve multiplying, squaring, or otherwise manipulating numbers in surprising ways. The tricks are explained step-by-step and include multiplying any two-digit number by 11, squaring two-digit numbers ending in 5 or beginning with 5, and multiplying by 9 using your fingers. Practice is recommended to master the tricks.
Divisibility rules from 2-20
This document provides divisibility rules for numbers 1 through 20. It lists the tests used to determine if a number is divisible by each number from 1 to 20. For each rule, it provides an example number and step-by-step working to show the rule being applied. The rules involve examining digits of the number, performing operations on the digits like addition and subtraction, and checking if the resulting values are divisible by the given number.
Long division
The document provides step-by-step instructions for solving division problems. It demonstrates how to divide multi-digit numbers by breaking the problem down into a series of single-digit divisions, starting from the left. Users are guided through examples like 682 divided into 4 groups, 8,437 divided into 6 groups, and shown how to determine the quotient and any remainder. Real-life word problems are also provided to put the division concepts into context.
September 28th 2009
The document provides a schedule for the week of September 28th through October 1st. It includes assignments to complete pages in the SAB textbook on certain dates and to study for a Unit 1 assessment on Friday. It also describes an activity called "Random Clues" and continuing a math workshop on specific SAB pages. There is a discussion worked example of solving a division word problem involving dividing 880 baseball cards into envelopes holding 35 cards each.
Subtracting with Regrouping.ppt
A fun math activity for dice. Roll the dice to see what number you are subtracting. Includes thorough explanation of regrouping. Worksheet also included.
Day 6 examples u7f13
The document provides two problems related to trigonometric identities and equations. The first problem asks the student to complete Janelle's partial solution to an equation involving sine and provides her work so far. The second problem asks the student to explain why the equation csc x = 1/2 has no solution.
Playing with numbers
The document discusses divisibility tests for numbers 2 through 11. It provides the rules to determine if a number is divisible by each divisor. For each rule, it gives examples of numbers and determines if they are divisible. It also gives a multiple choice question asking to identify which numbers formed from the digits 7, 2, and 9 are divisible by 3, 6, 9, and 10. It is determined that all 6 numbers are divisible by 3 and 9, and numbers 792 and 972 are divisible by 6.
Division
Division involves grouping objects into equal parts. The document explains division using examples such as sharing 6 cookies between 2 mice and sharing 8 cupcakes between 3 plates. It discusses key division terms like dividend, divisor, and quotient. Readers are prompted to work through sample division word problems and write the corresponding mathematical statements.
Kungfu math p3 slide4 (multiplication)
Multiplication and division are introduced. Key terms are defined:
- In multiplication, the multiplicand and multiplier produce a product.
- In division, the dividend is divided by the divisor to find the quotient. Any amount left over is the remainder.
Examples are provided of multiplying 1, 2 and 3 digit numbers by 1 digit numbers. Long division is demonstrated to find quotients and remainders. Practice questions reinforce understanding of these key mathematical concepts and terms.
Chapter 7 Notes
The document provides instructions for estimating products and dividing fractions and mixed numbers. It explains the steps to multiply fractions by multiplying across, to multiply mixed numbers by first converting to improper fractions and then multiplying, to divide fractions by changing the second number to its reciprocal and then multiplying, and to divide mixed numbers by first changing to improper fractions, changing the second number to its reciprocal, and then multiplying. It also gives an example of finding patterns in number sequences by looking for a consistent pattern that holds for more than the first two numbers.
More Related Content
What's hot
Multiply three by two digits
The document provides step-by-step instructions for multiplying 3-digit numbers by 2-digit numbers. It emphasizes the importance of keeping numbers aligned and shows an example problem worked out step-by-step, arriving at the solution of 125 x 54 = 6,750. It then prompts the reader to try two additional practice problems on their own.
Day 15 two step inequalities
This document provides examples and instructions for solving two-step inequalities. It begins with a warm up quiz on basic math skills. It then asks students to identify the previous knowledge needed to solve an inequality like 2y - 3 ≤ -5. Students are instructed to write a step-by-step guide for solving similar inequalities. The bulk of the document provides 7 examples of two-step inequalities for students to solve, with space below each for their work. It concludes by asking students to explain why inequalities have solution sets.
Divide
This document provides instructions for dividing multi-digit numbers by one-digit divisors using the "family method". It explains the parts of a division problem and the steps to solve it. The family method involves finding the closest multiple (Father), multiplying it by the divisor (Mother), subtracting (Sister), and bringing down the next digit (Brother). Examples are provided to demonstrate solving a full division problem using this step-by-step method. Students are assigned practice problems to reinforce the technique.
Long division intro
This document provides step-by-step instructions for solving long division problems. It explains that you take the divisor and repeatedly subtract it from the dividend, grouping the numbers in the quotient. For example, if dividing 36,987 by 5, you would find that 5 goes into 36 seven times, with a remainder carried to the next group. Carrying out this process reveals the full quotient is 7,397 with a remainder of 2. The document also includes examples of setting up word problems as division calculations.
Multiplying by two-and three times one-digit
The document provides step-by-step instructions for multiplying two- and three-digit numbers by a one-digit number. It explains that the process involves multiplying the ones place values first, carrying values to the next place if needed, and then multiplying each subsequent place value while accounting for any carried values. Two examples are shown working through multiplying 45 by 5 and 364 by 4 to arrive at the final answers of 225 and 1,456 respectively.
Factorsprimessquare (1)
This document discusses factors and prime numbers. It provides examples of finding all the factors of different numbers like 10, 8, 20, 36. It explains that a number is prime if it only has two factors - 1 and itself. It also introduces the concept of square numbers and uses factors to demonstrate different ways to multiply numbers like 12 x 4 x 3. In the end, it shows another method to find the factors of 26 x 6 by writing them out horizontally.
Multiply Two-Digit Numbers
This document provides instructions for multiplying two-digit numbers by two-digit numbers in 5 steps:
1) Multiply the ones place of the first number by the ones place of the second number.
2) Multiply the ones place of the first number by the tens place of the second number and add any carries.
3) Repeat for the tens place of the first number.
4) Add the partial products together.
5) The sum is the total product of the multiplication problem.
Amazing Math Tips & Tricks
This document presents several math tricks for operations like squaring two-digit numbers ending in 5, multiplying numbers by 4, 5, 11, 15, and dividing numbers. It explains tricks for squaring numbers like 35 by multiplying the first digit by the next number and adding 25. For multiplication, it offers tricks like doubling a number twice to multiply by 4, or halving and multiplying by 10 to multiply by 5. Divisibility checks are also explained for numbers like 11 by alternating addition and subtraction of digits. Practice of the tricks is recommended to master them. In the end, the reader is challenged to add a series of numbers as a math trick, but mistakenly answers 5000 instead of the correct answer of 4100.
Math 'e' Magic
Mathemagic is inspired from Vedic Mathematics and Smart Maths to develope a passion for quantitative section of various entrance exams especially for those who belongs to non mathematic streams.
Wednesdayweek2
Okay, let's break this down step-by-step:
* The population is dropping at a rate of 255 people per year
* We want to know how long it will take for the change in population to be 2,040 people
* So we set up an equation: Rate x Time = Change
* Rate is -255 people/year
* Change is -2,040 people
* So the equation is: -255x = -2,040
* Solve for x: x = 2,040/-255 = 8 years
Therefore, it will take 8 years for the change in population to be 2,040 people.
Day 15 two step inequalities
This document provides instructions and examples for solving two-step inequalities. It begins with a do now section asking students to solve and graph basic inequalities like 7 < x + 3. It then provides an anticipatory set with questions to activate prior knowledge on solving inequalities. The main body walks through solving seven sample inequalities step-by-step. It concludes by reminding students that inequalities have solution sets and asking them to explain why in a sentence. For homework, it assigns practice problems from the textbook.
Dividing Numbers (web-based)
The document provides instructions for teaching students about division. It defines division as sharing objects equally or grouping objects. It gives examples of writing division number sentences and using multiplication to check the answer. It includes word problems and activities to help students practice dividing by 5, 6, and 9. Students are shown divisibility rules to determine if a number is divisible by 5, 6, or 9.
Amazing Maths Trick
This document provides several math tricks and puzzles that involve multiplying, squaring, or otherwise manipulating numbers in surprising ways. The tricks are explained step-by-step and include multiplying any two-digit number by 11, squaring two-digit numbers ending in 5 or beginning with 5, and multiplying by 9 using your fingers. Practice is recommended to master the tricks.
Divisibility rules from 2-20
This document provides divisibility rules for numbers 1 through 20. It lists the tests used to determine if a number is divisible by each number from 1 to 20. For each rule, it provides an example number and step-by-step working to show the rule being applied. The rules involve examining digits of the number, performing operations on the digits like addition and subtraction, and checking if the resulting values are divisible by the given number.
Long division
The document provides step-by-step instructions for solving division problems. It demonstrates how to divide multi-digit numbers by breaking the problem down into a series of single-digit divisions, starting from the left. Users are guided through examples like 682 divided into 4 groups, 8,437 divided into 6 groups, and shown how to determine the quotient and any remainder. Real-life word problems are also provided to put the division concepts into context.
September 28th 2009
The document provides a schedule for the week of September 28th through October 1st. It includes assignments to complete pages in the SAB textbook on certain dates and to study for a Unit 1 assessment on Friday. It also describes an activity called "Random Clues" and continuing a math workshop on specific SAB pages. There is a discussion worked example of solving a division word problem involving dividing 880 baseball cards into envelopes holding 35 cards each.
Subtracting with Regrouping.ppt
A fun math activity for dice. Roll the dice to see what number you are subtracting. Includes thorough explanation of regrouping. Worksheet also included.
Day 6 examples u7f13
The document provides two problems related to trigonometric identities and equations. The first problem asks the student to complete Janelle's partial solution to an equation involving sine and provides her work so far. The second problem asks the student to explain why the equation csc x = 1/2 has no solution.
Playing with numbers
The document discusses divisibility tests for numbers 2 through 11. It provides the rules to determine if a number is divisible by each divisor. For each rule, it gives examples of numbers and determines if they are divisible. It also gives a multiple choice question asking to identify which numbers formed from the digits 7, 2, and 9 are divisible by 3, 6, 9, and 10. It is determined that all 6 numbers are divisible by 3 and 9, and numbers 792 and 972 are divisible by 6.
Division
Division involves grouping objects into equal parts. The document explains division using examples such as sharing 6 cookies between 2 mice and sharing 8 cupcakes between 3 plates. It discusses key division terms like dividend, divisor, and quotient. Readers are prompted to work through sample division word problems and write the corresponding mathematical statements.
What's hot (20)
Similar to Kungfu math p4 slide2 (multiplication)
Kungfu math p3 slide4 (multiplication)
Multiplication and division are introduced. Key terms are defined:
- In multiplication, the multiplicand and multiplier produce a product.
- In division, the dividend is divided by the divisor to find the quotient. Any amount left over is the remainder.
Examples are provided of multiplying 1, 2 and 3 digit numbers by 1 digit numbers. Long division is demonstrated to find quotients and remainders. Practice questions reinforce understanding of these key mathematical concepts and terms.
Chapter 7 Notes
The document provides instructions for estimating products and dividing fractions and mixed numbers. It explains the steps to multiply fractions by multiplying across, to multiply mixed numbers by first converting to improper fractions and then multiplying, to divide fractions by changing the second number to its reciprocal and then multiplying, and to divide mixed numbers by first changing to improper fractions, changing the second number to its reciprocal, and then multiplying. It also gives an example of finding patterns in number sequences by looking for a consistent pattern that holds for more than the first two numbers.
FIRST GRADING
This document provides lessons on mathematical concepts and operations involving fractions, including:
1) Multiplying fractions mentally with denominators up to 10 by multiplying the numerators and denominators.
2) Visualizing division of fractions using illustrations to represent the operations.
3) Using rules for divisibility to determine if a number is divisible by 3, 6, 9, 4, 8, or 12 in order to find common factors.
Multiplication shortcuts
The document provides various shortcuts and methods for multiplication, division, and other mathematical operations involving large numbers:
1) It explains how to multiply 2-digit and 3-digit numbers using the standard multiplication algorithm but breaking it into steps.
2) It outlines methods for dividing numbers by 9, 99, or any number ending in 9 by finding the reciprocal of the divisor and converting the division into a multiplication problem.
3) Other shortcuts covered include squaring numbers ending in 5, multiplying by 12 by doubling each digit and adding to the next, and multiplying by 6 using the "half plus 5" method.
8:00 GED Math Week 1 Tue
The document provides instructions and examples for performing various fraction operations, such as changing fractions to mixed numbers and improper fractions, reducing fractions, adding and subtracting fractions, multiplying and dividing fractions, and canceling common factors. Key steps are outlined for each type of fraction problem to demonstrate the procedure. Examples are included to illustrate how to apply the steps to calculate fraction problems.
11:00 Tuesday 4/24 ABE Math
The document provides steps for comparing, adding, and subtracting fractions and mixed numbers:
1) To compare fractions, find a common denominator and then compare the numerators.
2) To add or subtract fractions, find the lowest common denominator, then add or subtract the numerators and simplify if possible.
3) When adding or subtracting mixed numbers, change improper fractions to mixed numbers, combine like terms, then add or subtract the whole numbers.
6 algebra
This document provides an introduction to algebra concepts including expressions, equations, inequalities, and order of operations. It uses word problems to demonstrate how algebra can be used to solve for unknown values. Step-by-step examples are provided to show algebraic operations like combining like terms, distributing, and substituting values. Key terms are defined to build a foundation for algebraic thinking and problem solving.
Vedic math
Ashok and Karan cross together in 2 minutes.
Karan returns alone in 2 minutes.
Hakim and Ramesh cross together in 10 minutes.
Ashok returns alone in 1 minute.
Ashok and Karan cross together again in 2 minutes.
Total time taken is 2 + 2 + 10 + 1 + 2 = 17 minutes.
11:00 ABE Math WED 4/25
This document provides instructions for adding, subtracting, and borrowing with fractions. It discusses finding common denominators, rewriting fractions, adding or subtracting numerators, and reducing fractions to lowest terms. Steps are outlined for adding and subtracting fractions with unlike denominators, including changing improper fractions to mixed numbers and borrowing from the whole number part when subtracting.
Chapter 2 Study Guides
1) A mixed number has a whole number part and a fractional part, while an improper fraction has a numerator larger than the denominator.
2) To change between mixed numbers and improper fractions, you can multiply or divide the whole number by the denominator and add or subtract the numerator.
3) When adding, subtracting, multiplying or dividing fractions, you often need a common denominator or need to use reciprocals.
32 multiplication and division of decimals
The document discusses how to multiply multi-digit decimal numbers. It explains that multiplication of multi-digit numbers is done by multiplying the digits in place value, starting from the ones place. The results are recorded and carried over as needed. It provides a step-by-step example of 47 x 6, showing how each digit is multiplied and the results carried to the next place value. It notes that the same process is followed for decimals, but the decimal point is placed in the final product so that the total number of decimal places is correct.
Decimal multiplication
This document provides steps for multiplying decimals by moving the decimal point. It explains that you count the number of decimal places in each number being multiplied, add them together to get the total decimal places, multiply the numbers, and then move the decimal point the total number of places to the left in the answer. It includes examples of multiplying decimals with different numbers of decimal places and provides a practice worksheet for additional practice.
Multiplying Numbers By 11 To 19
This document provides steps to multiply a two-digit number by 11 or 12. For 11, the first and last digits are the same, and the middle digits are found by adding the digits. For 12, each digit is multiplied by 2 and added to the next digit. This process is extended to multiplying by higher single-digit numbers like 13 by multiplying each digit by 3 instead of 2.
Multiplying Numbers By 11 To 19
This document provides steps to multiply a two-digit number by 11 or 12. For 11, the first and last digits are the same, and the middle digits are found by adding the digits. For 12, each digit is multiplied by 2 and added to the next digit. This process is extended to multiplying by higher single-digit numbers like 13 by multiplying each digit by 3 instead of 2.
The four operations
1) Addition involves combining numbers to find a total sum. The order of the numbers does not change the sum. When adding multi-digit numbers, you start with the ones place and work left.
2) Subtraction finds the difference between a starting number and the number removed. You may need to regroup tens into ones when subtracting multi-digit numbers.
3) Multiplication is used to find the total when there are a certain number of equal groups. When multiplying multi-digit numbers, you start with the ones place and work left.
Lesson 1 square numbers
This document contains a math worksheet with 20 questions about solving equations involving square numbers. The questions progress from simple equations like 2 x = 22 to more complex problems finding sums of squares or identifying Pythagorean triples. The document provides the questions, spaces to write answers, and a final slide with the correct answers. The goal is for students to practice solving problems involving square numbers at a Level 4 challenge and identify Pythagorean triples at Level 5.
Math Lesson 6.pptx
This document discusses divisibility rules for finding common factors of numbers. It provides examples of using the rules for 4, 8, 12, and 11 to determine if numbers are divisible. Students are asked to practice applying these rules to determine if given numbers are factors of other numbers. The divisibility rules covered are: for 4, the last two digits must be divisible by 4; for 8, the last three digits must be divisible by 8; for 12, the sum of the digits must be divisible by 2 and 3; and for 11, the sum of digits in odd and even places must be equal or differ by a multiple of 11.
Mathematics topics for class 6
Topics include square and cube numbers, types of numbers, prime and composite numbers and more...... like it if you feel it good :)
Long Division: Daddy, Momma, Sister, Brother, Rover
Long division is taught using a story about a family to help students remember the steps. Each family member represents a step in long division: Dad is divide, Mom is multiply, Sister is subtract, Brother is bring down, and Rover is repeat or remainder. The document then walks through an example problem step-by-step using the story characters to demonstrate how to set up and solve a long division problem.
MATH- Lesson 1-2 Module 6 (Quarter 1).pptx
This document provides instructions and examples for dividing multi-digit numbers by 1-2 digit numbers. It explains that division is splitting into equal parts and uses the division symbol. Steps for long division are shown, including writing the dividend, divisor, bringing down remaining digits, and noting any remainder. Examples ask students to find quotients such as 806 divided by 6 or 3462 divided by 5. The document demonstrates dividing with remainders and no remainders.
Similar to Kungfu math p4 slide2 (multiplication) (20)
Long Division: Daddy, Momma, Sister, Brother, Rover
Long Division: Daddy, Momma, Sister, Brother, Rover
More from kungfumath
Time
This document discusses telling time and writing time to the hour and half hour. It explains that a clock has two hands, with the long hand telling the minute and being called the minute hand, and the short hand telling the hour and being called the hour hand. It provides examples that when the minute hand is at 12 it is o'clock, and when the minute hand is at 6 it is half past, illustrating this with clocks showing 3 o'clock and half past 8. It notes that for stated times, the hour hand should be drawn between the stated hour and the next hour.
Money
This document discusses teaching children about money denominations, amounts, and word problems involving money. It explains that there are different coin and note values used in Singapore, how amounts are written in cents and dollars, and provides an example word problem where a child starts with 60 cents, buys an eraser leaving them with 20 cents, so the eraser must have been 40 cents. The key topics covered are identifying coin and note values, writing money amounts, and solving basic addition and subtraction word problems involving money.
Mass
This document discusses measuring and comparing mass. It explains how to find mass in non-standard units and compares the mass of a father, child, and baby. Key terms like heavier, heaviest, lighter, and lightest are defined. Examples are given to show how objects with different masses can be measured and compared using units represented by balls, with the book having a mass of 3 units and the cup having 2 units.
Length
This document discusses measuring and comparing lengths and introduces key terms like long, longer, longest, short, shorter, shortest, tall, taller, tallest, high, higher, highest. It provides examples of comparing the heights of trees and kites and asks the reader to compare and order pencils by length. The overall goal is to learn how to measure and compare lengths using comparative terms.
Numbers to 100
Whole Numbers
Numbers to 100
This document introduces numbers to 100, including counting, reading, writing, comparing, ordering, place values, and patterns with numbers. It provides examples of counting items, arranging numbers in ascending and descending order, completing number patterns by adding or subtracting 15 or 20, and encourages trying sample questions to practice these number concepts.
Numbers to 40
The document introduces whole numbers and counting to 40. It will cover reading, writing, comparing, and ordering numbers, as well as place value. Examples are provided to count items in groups of 10 and write the numbers in numeral and word form. The place value chart is introduced. Later examples show arranging numbers in ascending and descending order, and completing number patterns by adding or subtracting 10. Review questions are posed at the end.
Numbers to 20
This document provides an introduction to whole numbers and numbers to 20. It discusses counting, reading, writing, comparing and ordering numbers, as well as number patterns and place values. Key concepts covered include: 1) numbers can be written as numerals or words; 2) 1 and 2 digit numbers; 3) counting items and arranging numbers in order from greatest to smallest; 4) completing number patterns by adding or subtracting the same amount; and 5) understanding place value where a digit's value depends on its place in the number. Examples are provided to illustrate place value in numbers like 8, 7, 10, 13 and their digit values in the tens and ones
Multiplication
Multiplication can be represented as repeated addition. The document provides examples of using multiplication to solve one-step word problems involving finding the total number of objects from a given number of groups containing the same number of objects in each group. Examples show setting up multiplication equations to represent 4 groups of 3 balls, 6 groups of 3, 4 groups of 2, and 2 groups of 5.
Division
Division involves grouping quantities into equal sets. Examples shown include dividing 12 balls equally into boxes, with 3 balls in each box, dividing 18 faces into groups of 3, with 6 groups, and dividing 9 oranges equally into 3 bags, with 3 oranges in each bag. The document introduces division and solving one-step word problems using division to determine how quantities are divided equally among groups.
Addition within 100
This document provides instruction on adding two-digit numbers. It explains the formal algorithm for addition by adding the ones and tens places separately, including renaming when the ones place exceeds 9. An example problem of 31 + 20 is worked out step-by-step. It also gives a two-step word problem about Mrs. Tan and Mrs. Lee baking pies that is solved using addition. The goal is to teach students how to add two-digit numbers and solve word problems involving addition.
Addition within 20
This document provides an introduction to addition within 20. It includes examples of using number bonds to represent addition problems visually, with parts combining to make a whole. The addition symbol and count-on method for solving problems are demonstrated. Word problems involving addition are presented, such as finding how many sweets Jane has after getting more. The goal is for students to build number sense and skills for solving single-step addition word problems within 20.
Ordinal numbers
This document discusses ordinal numbers and their use in indicating the position of objects from left to right. It provides examples of using ordinal numbers to identify the position of fruits ordered from left to right, and the position of cars ordered from right to left. It includes an activity where the reader is asked to cross out the 5th bottle in a row.
Numbers to 20
This document provides an introduction to whole numbers and numbers to 20. It discusses counting, reading, writing, comparing and ordering numbers, as well as number patterns and place values. Key concepts covered include: 1) numbers can be written as numerals or words; 2) 1 and 2 digit numbers; 3) counting items and arranging numbers in order from greatest to smallest; 4) completing number patterns by adding or subtracting the same amount; and 5) understanding place value by recognizing the value of a digit based on its place in a number. Examples are provided to illustrate place value in numbers like 8, 7, 10, 13 and their digit values in the tens
Kungfu math p4 slide25 (tables)pdf
The document discusses analyzing tables to solve problems. It provides examples of calculating the total number of foreign stamps from a table and working through steps to find the number of stamps a person has after giving some away and receiving others. The document demonstrates reading tables, identifying relevant information, and using math operations like addition and division to solve problems based on the data in the tables.
Kungfu math p4 slide20 (lines)pdf
This document defines and provides examples of different types of lines in geometry:
- Perpendicular lines are lines that intersect at 90 degree angles. They can be labeled with a small box in the corner.
- Parallel lines never intersect and are always the same distance apart. They point in the same direction.
- The document provides instructions for using a set square and ruler to draw lines through specific points on a diagram.
Kungfu math p4 slide18 (money)pdf
The document discusses multiplication and division of money in decimal notation. It provides examples of writing dollar amounts in cents and examples of word problems involving calculating totals and change from purchases. One example problem asks what change a customer would receive after buying clothes totaling $61 and paying with $100. Another example asks how much a skirt costs if it is twice the price of a blouse and the total purchase and change amounts are given.
Kungfu math p4 slide23 (symmetry)pdf
The document discusses identifying symmetric figures and lines of symmetry. It explains that a line of symmetry can be found by folding a shape so that the folded edges match perfectly. It provides examples of symmetric shapes and asks students to find lines of symmetry and complete symmetric figures. The goal is for students to practice identifying symmetry in different shapes.
Kungfu math p4 slide17 (time)pdf
The document discusses measurement of time in seconds (s) and the 24-hour clock. It provides examples of adding and subtracting times by following steps of adding or subtracting the hours and minutes separately, and adjusting if the minutes total 60 or more by subtracting 60 from the minutes and adding 1 to the hours. An example word problem is given about a family's travel times to solve for how long they stayed at the zoo, which was 6 hours and 30 minutes.
Kungfu math p4 slide24 (tesellation)pdf
This document discusses the concept of tessellation in geometry. It defines tessellation as shapes that can be stacked or lined up without gaps. The document provides examples of shapes that can and cannot tessellate, and asks readers to identify which shapes tessellate in multiple choice questions. It encourages trying out the questions and directs readers to a website for more practice on this topic.
Kungfu math p4 slide17 (time)pdf
The document discusses measurement of time in seconds (s) and the 24-hour clock. It provides examples of adding and subtracting times by following steps of adding or subtracting the hours and minutes separately, and adjusting if the minutes total 60 or more by subtracting 60 from the minutes and adding 1 to the hours. An example word problem is given about a family's travel times to solve for how long they stayed at the zoo, which was 6 hours and 30 minutes.
More from kungfumath (20)
Kungfu math p4 slide2 (multiplication)
- 1. Whole Numbers Multiplication What will we learn today? • multiplication of a 4-digit number by a 1-digit number • multiplication of a 3-digit number by a 2-digit number
- 2. Before we begin, let’s recall some facts about multiplication.
- 3. Multiplying three digit by one digit numbers 413 413 413 413 x 2 x 2 x 2 x 2 6 26 826 Multiply the Multiply the Multiply the numbers numbers numbers 3 x2=6 1 x2=2 4 x2=8
- 4. Try this out! 2223 x 4
- 5. Try this out! +1 2223 x 4 2 3 x 4 is 12.
- 6. Try this out! +1 2223 x 4 92 8+1 is 9.
- 7. Try this out! +1 2223 x 4 892 2x4 is 8.
- 8. Try this out! +1 2223 x 4 8892 2x4 is 8.
- 9. How do we multiply 3-digit number by a 2-digit number ?
- 10. Let’s do it step by step Step 1: Multiply 414 by 3 Step 2: The rule is to Add a zero
- 11. Let’s do it step by step Step 3: Multiply 414 by 2 Step 4: Add up the numbers
- 12. You have done a great job! Let’s move on!
- 13. Are you ready to try out the questions?