72789
Description
Mind Map by Ellen Billingham, updated more than 1 year ago
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Created by Ellen Billingham
almost 11 years ago
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Proportion
- Direct
- If I bought 20 apples for £1, how much would 12 apples cost?
- Find how much 1 apple would cost
- 100/20
- 5p
- Multiply by the number you want to find out
- 5 x 12 = 60
- 12 apples cost 60p
- 12 apples cost 60p
- 5 x 12 = 60
- Multiply by the number you want to find out
- 5p
- 100/20
- Find how much 1 apple would cost
- AKA the unitary method
- If I bought 20 apples for £1, how much would 12 apples cost?
- Inverse
- If it takes 5 men 9 days to build a wall, how long does it take 6 men?
- Find how long it would have taken one man
- 5 x 9 = 45 days
- Divide it by the number of men you want to find out
- 45/6 = 7.5
- It takes 6 men 7.5 days
- It takes 6 men 7.5 days
- 45/6 = 7.5
- Divide it by the number of men you want to find out
- 5 x 9 = 45 days
- Find how long it would have taken one man
- If it takes 5 men 9 days to build a wall, how long does it take 6 men?
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