7th Grade Adding and Subtracting Fractions Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 7th Grade fractions worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Fractions7th Grade Adding and Subtracting Fractions Worksheet — Level 3 — Answers
Find a common denominator first. Give answers in simplest form.
1. −
Answer:
- Lowest common denominator is 30: = , =
- − =
- Simplify: =
2. −
Answer:
- Lowest common denominator is 42: = , =
- − =
- Simplify: =
3. −
Answer:
- Lowest common denominator is 30: = , =
- − =
- Simplify: =
4. −
Answer:
- Lowest common denominator is 56: = , =
- − =
- Simplify: =
5. +
Answer: 1 (or )
- Lowest common denominator is 24: = , =
- + =
- As a mixed number: 1
6. +
Answer:
- Lowest common denominator is 12: = , =
- + =
7. +
Answer:
- Lowest common denominator is 9: = , =
- + =
8. −
Answer:
- Lowest common denominator is 72: = , =
- − =
- Simplify: =
9. +
Answer: 1 (or )
- Lowest common denominator is 63: = , =
- + =
- As a mixed number: 1
10. −
Answer:
- Lowest common denominator is 18: = , =
- − =
11. +
Answer:
- Lowest common denominator is 12: = , =
- + =
- Simplify: =
12. +
Answer:
- Lowest common denominator is 56: = , =
- + =
- Simplify: =
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.