1. 2.3 Multiplying Rational Numbers The product of numbers having the same sign is positive. The product of numbers having different signs is negative.

2. Multiply Integers Find each product. a.4(-5) = -20  Same signs = negative product b.(-12)(-14) = 168  Same signs = positive product

3. Simplify Expressions Simplify the expression 4(-3y) – 15y. 4(-3y) – 15y = -12y – 15y = -27y

4. Multiply Rational Numbers Find

5. Evaluate Expressions Evaluate if

6. Multiplicative Property of -1 The product of any number and -1 is its additive inverse. For any number a, -1(a) = -a. Examples: (-1)(4) = -4(-1)(-2.3) = 2.3

7. More Practice!!!!! Textbook p. 81 - 82 #16 – 39, 42 – 49.