2.4 Multiplying and Dividing Real Numbers Objectives: Multiply and divide positive and negative numbers. Define properties of zero. Standards Addressed:

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Presentation transcript:

2.4 Multiplying and Dividing Real Numbers Objectives: Multiply and divide positive and negative numbers. Define properties of zero. Standards Addressed: H: Explain multiplication and division algorithms B: Discover, describe, and generalize patterns.

Ex. 1

d. ( 8)(-6) = -48 e. (-4)(-5.3) = 21.2 f. (-7)(2.6) = -18.2

Ex. 2

* -16/4 = -4 * (-3.2) ÷ (-0.8) = 4 * -25 ÷ 5 = -5

The Multiplicative Identity and Reciprocals

Ex. 3

-49 ÷ -7 = 7 5/9 ÷ 3 = 5/27 2/3 ÷ -4/5 = -5/6

Properties of Zero

Ex. 4

(-45) (0) = 0 17 ÷ 0 = undefined 0 ÷ 27 = 0

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