0-5: MULTIPLY AND DIVIDING RATIONAL NUMBERS. 0-5: Multiplying/Dividing Rational Numbers TThe rules about multiplying/dividing integers (covered yesterday)

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Multiplying and Dividing Rational Numbers

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Presentation transcript:

0-5: MULTIPLY AND DIVIDING RATIONAL NUMBERS

0-5: Multiplying/Dividing Rational Numbers TThe rules about multiplying/dividing integers (covered yesterday) are the same for multiplying/dividing all rational numbers MMultiplying with the same sign yields a positive answer MMultiplying with different signs yields a negative answer FFind each product or quotient 77.2(-0.2) - ÷ (-10.5) 2.28

 To multiply fractions, multiply numerators with numerators and denominators with denominators.  Reduce when possible  Convert mixed numbers into improper fractions

0-5: Multiplying/Dividing Rational Numbers TTwo numbers whose product is 1 are called multiplicative inverses or reciprocals SSimply flip the fraction FFind the reciprocal of each fraction 3 / 8 8 / / 5 Convert to an improper fraction: 14 / 5 5 / 14

TTo divide one fraction by another, flip the division into multiplication, and flip the fraction that came after the division sign. 11 / 3 ÷ 1 / 2 = 1 / 3 ● 2 / 1 = 2 / 3 33 / 8 ÷ 2 / 3 9 / 16 33 / 4 ÷ 2 1 / 2 3 / 10 -- 1 / 5 ÷ ( -3 / 10 ) 2 / 3

 Assignment  Page P19  1 – 47 (odds)