Slide 1

Multiply and Divide Integers7th Grade mathMultiplying integersMultiplying IntegersEasy, breezy, lemon, squeezy!!

Model the following problem on the number line:4 2

Remember: Represents 4 groups of 2OR2 groups of 4Model the following problem on the number line:-3 2

Remember: Represents2 groups of -3ORThe opposite of 3 groups of 2

So, Whats the Rule?If the factors have the same sign, your product is POSITIVE.If the factors have a different sign, your product is NEGATIVE.

SAME SIGN = POSITIVE ProductDIFFERENT SIGNS = NEGATIVE Product

Multiplying integers

Check your answers on next slide 7For each example ask pupils what sign the missing number will have and then what the number is.Links:Mental methods multiplication and divisionEquations solving equations

Multiplying integers ANSWERS!!8For each example ask pupils what sign the missing number will have and then what the number is.Links:Mental methods multiplication and divisionEquations solving equations

Independent PracticeGlencoe Skills Practice2-6

Additional Practice:If needed, Glencoe Practice 2-6Mastery, Integer Maze Glencoe 2-6

Dividing integersFact Families:Using multiplication and division, show the fact families for the following problems.

8, 2, 163, 9, 274, 5, 20

8, 2, 163, 9, 274, 5, 202 8 = 163 9 = 274 5 = 208 2 = 169 3 = 275 4 = 2016 2 = 827 9 = 320 4 = 516 8 = 227 3 = 920 5 = 4Develop a RuleUse your Fact Family organizer to develop a rule for dividing signed numbers.

1. - 6 (4) =4 (- 6) =

2. - 9 - 4 =- 4 - 9 =

So, Whats the Rule?If the dividend and divisor have the same sign, your quotient is POSITIVE.If the dividend and divisor have different signs, your quotient is NEGATIVE.

SAME SIGN = POSITIVE QuotientDIFFERENT SIGNS = NEGATIVE Quotient

(LOOK FAMILIAR?!?!?!!)Practice Problems55 (- 5)

-16 (-4)

32 - 8

-63 (-7)

-81 9

Independent PracticeGlencoe 2-8