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0-5: Multiply and Dividing Rational Numbers

0-5: Multiply and Dividing Rational Numbers. 0-5: Multiplying/Dividing Rational Numbers. The rules about multiplying/dividing integers (covered yesterday) are the same for multiplying/dividing all rational numbers Multiplying with the same sign yields a positive answer

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0-5: Multiply and Dividing Rational Numbers

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  1. 0-5: Multiply and Dividing Rational Numbers

  2. 0-5: Multiplying/Dividing Rational Numbers • The rules about multiplying/dividing integers (covered yesterday) are the same for multiplying/dividing all rational numbers • Multiplying with the same sign yields a positive answer • Multiplying with different signs yields a negative answer • Find each product or quotient • 7.2(-0.2) • -1.44 • -23.94 ÷ (-10.5) • 2.28

  3. 0-5: Multiplying/Dividing Rational Numbers • To multiply fractions, multiply numerators with numerators and denominators with denominators. • Reduce when possible • Convert mixed numbers into improper fractions

  4. 0-5: Multiplying/Dividing Rational Numbers • Two numbers whose product is 1 are called multiplicative inverses or reciprocals • Simply flip the fraction • Find the reciprocal of each fraction • 3/8 • 8/3 • 2 4/5 • Convert to an improper fraction: 14/5 • 5/14

  5. 0-5: Multiplying/Dividing Rational Numbers • To divide one fraction by another, flip the division into multiplication, and flip the fraction that came after the division sign. • 1/3 ÷ 1/2 = 1/3●2/1=2/3 • 3/8 ÷ 2/3 • 9/16 • 3/4 ÷ 21/2 • 3/10 • -1/5 ÷ (-3/10) • 2/3

  6. 0-5: Multiplying/Dividing Rational Numbers • Assignment • Page P19 • 1 – 47 (odds)

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