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**Multiplying and Dividing Integers**

Mrs. Young EMC 1

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**Rules When multiplying and dividing integers there are two rules:**

When multiplying or dividing integers that have the SAME sign, the answer is POSITIVE. Positive x positive = positive Negative x negative = positive +7 x +12 = +84 -6 x –5 = +30

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**Rules continued… Rule 2:**

When multiplying or dividing integers whose signs are DIFFERENT, the answer will always be NEGATIVE. Positive x negative = negative Negative x positive = negative +8 x –4 = -32 -5 x +7 = -35

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**Multiplying Integers Song**

Let’s Sing a Song! Multiplying Integers Song (sing to “Dead Bones” tune) Verse 1 A negative times a negative is a, (um) positive A negative times a positive is a, (um) negative A negative times a negative is a, (um) positive These are the rules for signs. Verse 2 If you have the same signs, you get a positive, But if they’re different, you get a negative, If you have the same signs, you get a positive, Yes, these are the rules for signs.

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Let’s Practice! What sign would the answer have in front of the integer??? -5 x -7 = ???

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POSITIVE!!!

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**What sign will be in front of the answer??**

How about… -6 x 9 = ??? What sign will be in front of the answer??

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NEGATIVE!!!

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Try this one! What sign will be in front of the answer??? -81 ÷ +9 = ???

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NEGATIVE!!!

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**Let’s solve some problems!**

-8 x –9 =

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+72

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+4 x +12 =

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+48

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-45 ÷ +5 =

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-9

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-63 ÷ +7 =

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-9

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-8 x –11 =

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+88

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**Remember… When multiplying and dividing integers:**

Same signs = a positive Different signs = a negative

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