+

Integer Rules Review

+Warm-Up: 9/91. 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-UpAdding and Subtracting Integers Review

Multiplying and Dividing Integer Rules

Integer FoldableWrap-UpHomework

+Adding Integers ReviewHow 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 MoneyRemember….. A negative number is like losing money and a positive number is like winning money

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

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

+Integers and MoneyThis is also like winning and losing money.

5 – 10 A win of $5 and a loss of $10This 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