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Integer Rules Review

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Warm-Up: 9/9 1. Solve: If yesterday it was -4° and today it is 23°, how much warmer is it today than yesterday?

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**Adding and Subtracting Integers Review **

Today’s Agenda Warm-Up Adding and Subtracting Integers Review Multiplying and Dividing Integer Rules Integer Foldable Wrap-Up Homework

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**Adding Integers Review**

How do we add integers with the same sign? Add and keep the sign How do we add integers with different signs? Subtract and keep the sign of the larger.

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Let’s Sing a Song! Addition Rule: Sung to the tune of “Row, row, row, your boat” Same signs add and keep, different signs subtract, keep the sign of the higher number, then it will be exact!

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**-32 + (-12) 30 + (-25) -19 + 16 (-18) + (-15) -44 5 -3 -33**

Let’s Try Some…… -32 + (-12) 30 + (-25) (-18) + (-15) -44 5 -3 -33

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Integers and Money Remember….. A negative number is like losing money and a positive number is like winning money

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****This means you are still down $8!****

Integers and Money For example, is the same as…. A loss of $16 A gain of $8 **This means you are still down $8!**

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**Subtracting Integers Review**

How do we change a subtraction problem into an addition problem? Same Change Opposite (-4) – (-5) = (-4) + 5 5 – 10 = 5 + (-10)

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**This is also like winning and losing money. 5 – 10 **

Integers and Money This is also like winning and losing money. 5 – 10 A win of $5 and a loss of $10 This means you are in the hole $5, or -5

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Let’s Try Some (-23) – 10 18 – (-5) (-15) – (-8) 20 – 30 -33 23 -7 -10

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**Multiplication and Division of Integers**

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**Here’s a way I can Remember!**

To remember whether your answer will be positive or negative when MULTIPLYING or DIVIDING, we’ll use: Mr. Multiplivision

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**= -15 When multiplying Integers, cover the Two signs you are using**

Choral Response What sign is left uncovered? Ex.: 5 (-3) Negative, - That is the sign of The answer = -15

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Practice … (-10)(3) = 21 -5 = -13 -6 =

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Division Good News: It’s not any different! Ex.: -48 (-4) = + 12

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Reminder: Equal means it works both ways!

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SOLVE: (4)(-7) (-2) Turn to your neighbor: Person on the left: what’s good about this Right: What’s the bad consequence of this Response: They can copy notes, vocab, etc. while holding another conversation, thinking about the weekend, etc. Cornell notes: questions, summaries Frayer model- student worded definition Good News + It”s easy to get their attention with ANY thing different

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(4)(-7) (-2) First, (4)(-7) = - 28 Finish it! (-28)(-2) Answer: 14

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Integer Foldable er-foldable.html

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**Put your thinking cap on!**

A, B, C, D, and E correspond to points on a thermometer. Use these clues to plot the points: *B and D are negative *D is warmer than C *B is warmer than C *E and D are the same distance from zero *E is colder than A Compose your own thermometer problem and include your answer.

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Homework Handout: Problems 1-10

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