1. Multiplying and Dividing Integers
Section 2.4
Multiplying and Dividing Integers

2. Multiplying Signs (+) * (+) = + (-) * (-) = + (+) * (-) = -
(-) * (+) = -

3. (-) * (-) = +
(-68) * (-194)

4. (-) * (+) = -
(-94) * (623)

5. Example
Simplify
-6(-65)
23 * -13
-93 * 51
121 (-43)

6. Dividing Signs
(+) / (+) = +
(-) / (-) = +
(+) / (-) = -
(-) / (+) = -

7. (+) / (+) = +
725 / 25

8. (+) / (-) = -
(22960) / (-112)

9. Example
Simplify
90 / -9
-225 ÷ -5
-169 ÷ 13
98 / 7

10. Exponents ab = a * a * a*… *a (b a’s)
-ab = - a* a * a * a*… *a (b a’s)

11. Example
Simplify 54
(5)4
-54
(-5)4

12. Word Problem
An investor lost $400 on each of seven consecutive days in the stock market. Represent his total as a product of signed numbers and find his total loss.

13. Word Problem
For the first quarter of 2013, Wal-Mart, Inc. posted a loss of $33 million in membership and other income. If this trend was consistent for each month of the quarter, how much would you expect this loss to have been for each month?