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Use equivalent fractions to combine and compare amounts with related denominators.
Free examples and worked answers. No account needed.
Practise the method.
Use equivalent fractions to combine and compare amounts with related denominators.
Use equivalent fractions to combine and compare amounts with related denominators.
Example 1
A recipe uses 21 cup of milk, then another 32 cup. How many cups are used altogether? Give an exact fraction or whole number.
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Answer: 67
- Both amounts are parts of one cup. Express them in 6ths: 63 and 64.
- The total is 67=67 cup.
Example 2
A recipe uses 41 cup of milk, then another 83 cup. How many cups are used altogether? Give an exact fraction or whole number.
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Answer: 85
- Both amounts are parts of one cup. Express them in 8ths: 82 and 83.
- The total is 85=85 cup.
Example 3
Calculate 34−21. Give an exact fraction or whole number.
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Answer: 65
- Convert 21 to 63.
- Subtract the numerators: 68−3=65.
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