Fraction Division

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Fraction Division

• Opposite of Multiplication

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The opposite number

• Invert
• Called the reciprocal

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To Divide

• Invert the second number
• Multiply

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Steps

• Change Whole numbers and mixed numbers to
  improper fractions
• Invert the second fraction (the divisor) and
  multiply
• Cancel if you can
• Multiply numerator by numerator and denominator
  by denominator.

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Examples
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7

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Word Problems
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Commutative

• Multiplication is commutative
• 3x4 4x3
• Is division commutative?
• NO!

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Division

• The order matters
• When working word problems, be careful what order
  you write the problem.
• The thing being split, cut, sorted, shared,
  divided, or grouped goes first.
• How many pieces or how big goes second.

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Fran puts 5 1/3 lbs of chocolate in 2/3 lb
containers. How many containers?

• Chocolate is first as it is split.
• Total divided by How Big is How Many.
• 8 containers.

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elements

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