+

Integer Rules Review

+Warm-Up: 9/9

1. Solve: -42 + 17

2. If yesterday it was -4° and today it is 23°, how much warmer is it today than yesterday?

+Today’s AgendaWarm-Up

Adding and Subtracting Integers Review

Multiplying and Dividing Integer Rules

Integer Foldable

Wrap-Up

Homework

+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.

+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!

+Let’s Try Some……

-32 + (-12)30 + (-25)-19 + 16(-18) + (-15)

-445-3-33

+Integers and Money

Remember…..

A negative number is like losing money and a positive number is like winning money

+Integers and Money

For example,

-16 + 8 is the same as….

A loss of $16

A gain of $8

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

+Subtracting Integers Review

How do we change a subtraction problem into an addition problem?Same Change Opposite(-4) – (-5) = (-4) + 55 – 10 = 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

+Let’s Try Some

(-23) – 1018 – (-5)(-15) – (-8)20 – 30

-3323-7-10

+

Multiplication and Division of Integers

+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

When multiplyingIntegers, cover the Two signs you are using

Ex.: 5 (-3)

What sign is leftuncovered?

Negative, - That is the sign of The answer

= -15

Choral Response

Practice …

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

Division

Good News: It’s not any different!

Ex.: -48 (-4)

= + 12

+Reminder:

Equal means it works both ways!

+

SOLVE:(4)(-7) (-2)

+ (4)(-7) (-2)

First, (4)(-7)

= - 28

Finish it! (-28)(-2)

Answer: 14

+Integer Foldable

http://everybodyisageniusblog.blogspot.com/2012/07/integer-foldable.html

+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.

+Homework

Handout: Problems 1-10