DIVIDE FRACTION

1. Fraction Division
Opposite of Multiplication

2. The opposite number:
• Invert
• Called the reciprocal
• 3
4
invert to make
4
3

3. To Divide
• Invert the
second number
• Multiply
2 3 2 4 8
÷ = × =
5 4 5 3 15

4. 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.

5. Examples

6. •
1
÷2
4
1 2
÷
4 1
1 1
×
4 2
1 1 1
× =
4 2 8

7. •
3
1
÷2
4
5
3 11
÷
4 5
3 5
×
4 11
3 5 15
× =
4 11 44

8. Word Problems

9. Commutative
•
•
•
•
Multiplication is commutative
3x4 = 4x3
Is division commutative?
NO!

10. 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.

11. 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.
1 2 16 3 8 1
5 ÷ = × = × =8
3 3
3 2 1 1
• 8 containers.

12. elements
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