Year 7 Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 7 decimals worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · DecimalsYear 7 Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 2 — Answers
Line up the decimal points before you add or subtract.
1.
57.7
−19.9
Answer: 37.8
- Line up the decimal points
- 57.7 − 19.9 = 37.8
2.
30.2
−2.6
Answer: 27.6
- Line up the decimal points
- 30.2 − 2.6 = 27.6
3.
43.0
−8.2
Answer: 34.8
- Line up the decimal points
- 43.0 − 8.2 = 34.8
4.
17.1
+30.2
Answer: 47.3
- Line up the decimal points
- 17.1 + 30.2 = 47.3
5.
45.0
+25.4
Answer: 70.4
- Line up the decimal points
- 45.0 + 25.4 = 70.4
6.
58.1
−31.8
Answer: 26.3
- Line up the decimal points
- 58.1 − 31.8 = 26.3
7.
42.9
+39.1
Answer: 82.0
- Line up the decimal points
- 42.9 + 39.1 = 82.0
8.
14.9
+25.8
Answer: 40.7
- Line up the decimal points
- 14.9 + 25.8 = 40.7
9.
8.8
+25.4
Answer: 34.2
- Line up the decimal points
- 8.8 + 25.4 = 34.2
10.
35.6
−22.0
Answer: 13.6
- Line up the decimal points
- 35.6 − 22.0 = 13.6
11.
59.1
−31.9
Answer: 27.2
- Line up the decimal points
- 59.1 − 31.9 = 27.2
12.
23.4
−16.9
Answer: 6.5
- Line up the decimal points
- 23.4 − 16.9 = 6.5
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.