This document outlines a fifth grade mathematics curriculum guide from the Isaac School District. Unit 9 focuses on data analysis and probability. Students will understand probability, how it can be represented, and how mathematical methods can maximize efficiency. They will learn to fluently multiply multi-digit numbers, find quotients of whole numbers with up to four-digit dividends and two-digit divisors, and make and interpret line plots displaying fractional data. Examples are provided to illustrate different strategies and models for solving problems within these domains.
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Unit 9 Fifth Grade cs 2012 2013
1. Isaac School District, No. 5
Mathematics Curriculum Guide: Fifth Grade
Unit 9
How Long Can You Stand on One Foot?
Data Analysis and Probability
Big Ideas: Essential Questions:
Students will understand that:
Probability is the likelihood of an event to occur. What is the difference between probability and a guess?
Probability can be represented in various forms. Why do we use more than one form to represent probability?
Mathematical methods can be used to maximize efficiency. Why is it important to take the most efficient path?
Unit Vocabulary: probability, experiments,
Domain: Domain: Number and Operations in Base Ten (NBT)
AZ Math Standards Mathematical Practices
Cluster: Perform operations with multi-digit whole numbers and with decimals to hundredths.
Students are expected to:
5.NBT.5. Fluently multiply multi-digit whole numbers using the standard algorithm. 5.MP.2. Reason abstractly and quantitatively.
5.MP.6. Attend to precision.
5.MP.7. Look for and make use of structure.
5.MP.8. Look for and express regularity in repeated reasoning.
Explanations and Examples
In prior grades, students used various strategies to multiply. Students can continue to use these different strategies as long as they are efficient, but must also understand and
be able to use the standard algorithm. In applying the standard algorithm, students recognize the importance of place value.
Example:
123 x 34. When students apply the standard algorithm, they, decompose 34 into 30 + 4. Then they multiply 123 by 4, the value of the number in the ones place, and then multiply
123 by 30, the value of the 3 in the tens place, and add the two products.
Fifth Grade
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2. Isaac School District, No. 5
Mathematics Curriculum Guide: Fifth Grade
Students are expected to:
5.NBT.6. Find whole-number quotients of whole numbers with up to four-digit 5.MP.2. Reason abstractly and quantitatively.
dividends and two-digit divisors, using strategies based on place value, the properties
of operations, and/or the relationship between multiplication and division. Illustrate and 5.MP.3. Construct viable arguments and critique the reasoning of others.
explain the calculation by using equations, rectangular arrays, and/or area models.
(Sessions: 1.5 / 1.6 / 1.9) 5.MP.4. Model with mathematics.
Connections: ET05-S1C2-02
5.MP.5. Use appropriate tools strategically.
5.MP.7. Look for and make use of structure..
Explanations and Examples
In fourth grade, students’ experiences with division were limited to dividing by one-digit divisors. This standard extends students’ prior experiences with strategies, illustrations,
and explanations. When the two-digit divisor is a “familiar” number, a student might decompose the dividend using place value.
Example:
Using expanded notation ~ 2682 ÷ 25 = (2000 + 600 + 80 + 2) ÷ 25
Using his or her understanding of the relationship between 100 and 25, a student might think ~
o I know that 100 divided by 25 is 4 so 200 divided by 25 is 8 and 2000 divided by 25 is 80.
o 600 divided by 25 has to be 24.
o Since 3 x 25 is 75, I know that 80 divided by 25 is 3 with a reminder of 5. (Note that a student might divide into 82 and not 80)
o I can’t divide 2 by 25 so 2 plus the 5 leaves a remainder of 7.
o 80 + 24 + 3 = 107. So, the answer is 107 with a remainder of 7.
Using an equation that relates division to multiplication, 25 x n = 2682, a student might estimate the answer to be slightly larger than 100 because s/he recognizes that 25 x 100
= 2500.
Example: 968 ÷ 21
Using base ten models, a student can represent 962 and use the models to make an array with one dimension of 21. The student continues to make the array until no
more groups of 21 can be made. Remainders are not part of the array.
Continued on Next page
Fifth Grade
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3. Isaac School District, No. 5
Mathematics Curriculum Guide: Fifth Grade
Explanations and Examples
Example: 9984 ÷ 64
An area model for division is shown below. As the student uses the area model, s/he keeps track of how much of the 9984 is left to divide.
Fifth Grade
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4. Isaac School District, No. 5
Mathematics Curriculum Guide: Fifth Grade
Domain: Measurement and Data (MD)
AZ Math Standards Mathematical Practices
Cluster: Represent and interpret data
Students are expected to:
5.MD.2. Make a line plot to display a data set of measurements in fractions of a unit 5.MP.1. Make sense of problems and persevere in solving them.
(1/2, 1/4, 1/8). Use operations on fractions for this grade to solve problems involving
information presented in line plots. For example, given different measurements of liquid 5.MP.2. Reason abstractly and quantitatively.
in identical beakers, find the amount of liquid each beaker would contain if the total
amount in all the beakers were redistributed equally. 5.MP.4. Model with mathematics.
Connections:5.RI.7; 5.W.2d; ET05-S1C2-02
5.MP.5. Use appropriate tools strategically.
5.MP.6. Attend to precision.
5.MP.7. Look for and make use of structure.
Explanations and Examples
Ten beakers, measured in liters, are filled with a liquid.
The line plot above shows the amount of liquid in liters in 10 beakers. If the liquid is redistributed equally, how much liquid would each beaker have? (This amount is the mean.)
Students apply their understanding of operations with fractions. They use either addition and/or multiplication to determine the total number of liters in the beakers. Then the sum
of the liters is shared evenly among the ten beakers.
Fifth Grade
Investigation Unit 9
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Created on 2/4/2012 8:36 AM
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5. Isaac School District, No. 5
Mathematics Curriculum Guide: Fifth Grade
Fifth Grade
Investigation Unit 9
Draft
Created on 2/4/2012 8:36 AM
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