Year 7 Adding and Subtracting Fractions Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the Year 7 fractions worksheet.
Year 7 · Mathematics · Fractions
Year 7 Adding and Subtracting Fractions Worksheet — Level 3 — Answers
Success Tutoring
Find a common denominator first. Give answers in simplest form.
1. +
Answer:
- Lowest common denominator is 72: = , =
- + =
2. +
Answer: 1 (or )
- Lowest common denominator is 40: = , =
- + =
- Simplify: =
- As a mixed number: 1
3. +
Answer:
- Lowest common denominator is 12: = , =
- + =
4. +
Answer: 1 (or )
- Lowest common denominator is 30: = , =
- + =
- Simplify: =
- As a mixed number: 1
5. +
Answer: 1 (or )
- Lowest common denominator is 40: = , =
- + =
- As a mixed number: 1
6. −
Answer:
- Lowest common denominator is 90: = , =
- − =
- Simplify: =
7. +
Answer: 1 (or )
- Lowest common denominator is 30: = , =
- + =
- As a mixed number: 1
8. +
Answer: 1 (or )
- Lowest common denominator is 20: = , =
- + =
- As a mixed number: 1
9. +
Answer:
- Lowest common denominator is 21: = , =
- + =
10. +
Answer:
- Lowest common denominator is 20: = , =
- + =
- Simplify: =
11. −
Answer:
- Lowest common denominator is 72: = , =
- − =
- Simplify: =
12. +
Answer: 1 (or )
- Lowest common denominator is 20: = , =
- + =
- As a mixed number: 1
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.
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