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Multiplying and Dividing Integers

Multiplying and Dividing Integers. A REVIEW OF THE RULES. 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

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Multiplying and Dividing Integers

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  1. Multiplying and Dividing Integers A REVIEW OF THE RULES

  2. 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

  3. 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

  4. Let’s Practice! What sign would the answer have in front of the integer??? -5 x -6 = ???

  5. POSITIVE!

  6. How about… -6 x 8 = ??? What sign will be in front of the answer??

  7. NEGATIVE!

  8. Try this one! What sign will be in front of the answer??? -72÷ +9 = ???

  9. NEGATIVE!

  10. Let’s TRY SOLVING some problems: -6 x –4 =

  11. 24

  12. 4 x 11 =

  13. 44

  14. 45 ÷ -5 =

  15. -9

  16. -70 ÷ 7 =

  17. -10

  18. 8 x –11 =

  19. -88

  20. So Remember… • When multiplying and dividing integers: Same signs = a positive Different signs = a negative

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