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.
8.6
+31.7
Answer: 40.3
- Line up the decimal points
- 8.6 + 31.7 = 40.3
2.
38.6
−31.0
Answer: 7.6
- Line up the decimal points
- 38.6 − 31.0 = 7.6
3.
14.8
+37.3
Answer: 52.1
- Line up the decimal points
- 14.8 + 37.3 = 52.1
4.
58.7
+38.3
Answer: 97.0
- Line up the decimal points
- 58.7 + 38.3 = 97.0
5.
46.6
+27.7
Answer: 74.3
- Line up the decimal points
- 46.6 + 27.7 = 74.3
6.
48.3
−26.6
Answer: 21.7
- Line up the decimal points
- 48.3 − 26.6 = 21.7
7.
17.1
+4.2
Answer: 21.3
- Line up the decimal points
- 17.1 + 4.2 = 21.3
8.
35.5
+20.4
Answer: 55.9
- Line up the decimal points
- 35.5 + 20.4 = 55.9
9.
39.7
−12.0
Answer: 27.7
- Line up the decimal points
- 39.7 − 12.0 = 27.7
10.
34.7
+39.8
Answer: 74.5
- Line up the decimal points
- 34.7 + 39.8 = 74.5
11.
25.5
+26.1
Answer: 51.6
- Line up the decimal points
- 25.5 + 26.1 = 51.6
12.
19.1
−13.5
Answer: 5.6
- Line up the decimal points
- 19.1 − 13.5 = 5.6
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.
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