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New week 1

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New week 1

  1. 1. Pre – Algebra • Please write your homework down in your agenda book. • Review Class expectations • Please get out your spiral notebooks – Accentuate the Negative • Mathematical Highlights • Begin working on tonight’s homework – Pizzazz Worksheet 1 and 2
  2. 2. I. Classroom Rules 1. Always show respect for everyone in the class. Treat people the way you want to be treated 2. Students will be on time, in their seat, and ready to go when the bell rings. 3. Bring all your materials with you everyday 4. Don’t talk when someone else is talking. Wait your turn!
  3. 3. I. Classroom Rules 5. Sharpen your pencil before the tardy bell rings. 6. No food or drink in the classroom. This includes gum, and candy. 7. Follow directions the first time they are given. 8. Stay on task
  4. 4. Mathematical Highlights In Accentuate the Negative you will develop understanding of and algorithms for operations with integers. The unit should help you to: • Compare and order rational numbers and locate them on a number line • Understand the relationship between an integer and its opposite • Relate direction and distance to the number line • Develop and use different models for representing +, -, x, • Interpret and write mathematical sentences • Use order of operation, commutative property, distributive property • Use models and rational numbers to represent and solve problems
  5. 5. Investigation 1 Vocabulary • Number line • a picture of a straight line on which every point is assumed to correspond to a real number and every real number to a point Integer • Rational number • Numbers that can be expressed as a quotient of two integers, where the divisor is not zero • Negative number • A number less than zero. On a number line, negative numbers are located to the left of zero • Positive number • A number greater than zero. On a number line, positive numbers are located to the right of zero • Opposites • Two numbers whose sum is zero. On a number line, opposites are the same distance from 0 but in different directions from 0. Integers • The whole numbers and their opposites
  6. 6. Pre – Algebra Warm-up: Draw a number line and label the following 1. positive numbers 2. negative numbers 3. zero On the same number line, graph the following numbers 4. -5 5. 3 2 3
  7. 7. Pre- Algebra • Please have your homework on your desk and get started on your warm up. • Discuss last night’s homework – Pizzazz Worksheet p. 1 and 2 • Please have your spiral notebooks on your desk. – 1.1 Playing Math Fever • Get started on tonight’s homework – Labsheet 1and Workbook p. 43
  8. 8. Accentuate the Negative • Most of the numbers you have worked with in math class have been greater than or equal to zero. However, numbers less than zero can provide important information. Winter temperatures in many places fall below Businesses that lose money have profits less than $0. Scores in games or sports can be less than zero. F0 0 F0 0
  9. 9. Think about it??? • A person goes from a sauna at 115 degrees F to an outside temperature of -30 degrees F. What is the change in temperature? • Water flows into and out of a water tower at different rates throughout the day. When is the water in the water tower at its highest level?
  10. 10. Investigation 1 1.1 Playing Math Fever: Using Positive and Negative Numbers Focus Question: How can you find the total value of a combination of positive and negative integers? One of the most useful representations of numbers is a number line. A number line displays numbers in order so that their relationship to each other is clear. You can determine whether numbers are less than or greater than other numbers by looking at their position on a number line. Which number is greater, -2.3 or 1.2 ?
  11. 11. 1.1 Playing Math Fever • Ms. Griffin’s math classes often play Math Fever, a game similar to a popular television game show. The game board is shown. Below each category name are five cards. The front of each card shows a point value. The back of each card has a question related to the category. Cards with higher point values have more difficult questions.
  12. 12. Math fever is played in teams. One team starts the game by choosing a card. The teacher asks the question on the back of the card. The first team to answer the question correctly gets the point value on the card. The card is then removed from the board. If a team answers the question incorrectly, the point value is subtracted from their score. The other teams may then try to answer the question. The team that answers correctly chooses the next card.
  13. 13. 1/09/14 Pre –Algebra Warm-up Write the opposite of each integer 1. 5 2. -12 3. 3 Tell what the team’s score is after the events described. Assume the team starts with 0 points. 4. The protons answer a 250-point question correctly, a 100-point question correctly, a 200-point question correctly, a 150-point question incorrectly, and a 200-point question incorrectly. 5. The electrons answer a 50-point question incorrectly, a 200-point question incorrectly, a 100-point question correctly, a 200-point question correctly, and a 150-point question incorrectly.
  14. 14. Pre-Algebra Wednesday • Please have your homework on your desk and get started on your warm up. • Discuss last night’s homework – Labsheet 1and Workbook p. 43 • Please have your spiral notebooks on your desk. – 1.2 Extending the Number Line • Get started on tonight’s homework – Labsheet Exercise 48
  15. 15. Investigation 1 1.2 Extending the Number Line Focus Question: How can you use a number line to compare two numbers? Rational numbers are numbers that can be expressed as one integer a divided by another integer b, where b is not zero. You can write a rational number in the form or in decimal form. b a b a
  16. 16. • Each negative number can be paired with a positive number. These two numbers are called opposites because they are the same distance from zero on the number line, but in different directions. • To avoid confusion with operation signs, you can use raised signs to show negative numbers
  17. 17. Pre- Algebra Warm-up:
  18. 18. Pre-Algebra Thursday • Please have your homework on your desk and get started on your warm up. • Discuss last night’s homework – Labsheet Ex 48 • Turn in weekly assignment sheet • More Practice with substitution

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