7th Grade Adding and Subtracting Fractions Worksheet — Level 3 — Practice Set 4 — 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 — Practice Set 4 — Answers
Find a common denominator first. Give answers in simplest form.
1. −
Answer:
- Lowest common denominator is 72: = , =
- − =
2. +
Answer:
- Lowest common denominator is 40: = , =
- + =
- Simplify: =
3. −
Answer:
- Lowest common denominator is 30: = , =
- − =
4. −
Answer:
- Lowest common denominator is 20: = , =
- − =
5. −
Answer:
- Lowest common denominator is 42: = , =
- − =
- Simplify: =
6. +
Answer: 1 (or )
- Lowest common denominator is 15: = , =
- + =
- As a mixed number: 1
7. −
Answer:
- Lowest common denominator is 8: = , =
- − =
- Simplify: =
8. −
Answer:
- Lowest common denominator is 12: = , =
- − =
9. +
Answer: 1 (or )
- Lowest common denominator is 21: = , =
- + =
- As a mixed number: 1
10. −
Answer:
- Lowest common denominator is 8: = , =
- − =
11. +
Answer: 1 (or )
- Lowest common denominator is 20: = , =
- + =
- As a mixed number: 1
12. +
Answer: 1 (or )
- Lowest common denominator is 35: = , =
- + =
- 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.