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24 Multiplying and Dividing Real Numbers

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24  Multiplying and Dividing Real Numbers Powered By Docstoc
					2.4 Multiplying and Dividing Real
            Numbers
 Objectives: Multiply and divide positive and
negative numbers. Define properties of zero.

   Standards Addressed: 2.2.5.H: Explain
multiplication and division algorithms. 2.8.8.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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posted:7/11/2013
language:English
pages:13
Jun Wang Jun Wang Dr
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