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Lesson 1-2 Multiplying Rational Numbers

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1 Lesson 1-2 Multiplying Rational Numbers
Obj: The student will be able to multiply fractions, mixed numbers and decimals. HWK: Vocab: 1) mixed numbers 2) improper numbers COS: 7-NS2

2 Rules for multiplying and dividing rational numbers
If the signs of the factors are the same, the product/quotient is positive + • + = + - • - = + / + ÷ + = + - ÷ - = + If the signs of the factors are different, the product/quotient is negative + • - = - - • + = - / + ÷ - = - - ÷ + = - (If more than 2 factors, count the number of negative signs – if even # of – signs = +, if odd # of – signs = -)

3 Multiply. Write each answer in simples form
Ex 1) 6( 2 3 ) Ex 2) -2( ) Ex 3) ( ) Ex 4) ( )

4 Multiply Ex 5) – 5.2(- 5) Ex 6) (4.6)

5 Ex 7) Andrew walks his dog 1 8 mile each day
Ex 7) Andrew walks his dog mile each day. What is the total distance that Andrew walks his dog in a 5-day week?

6 Ex 8) Explain how to multiply
A fraction and a mixed number Two decimals A decimal and a fraction


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