Year 7 Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 4 — 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 4 — Answers
Line up the decimal points before you add or subtract.
1.
18.1
−17.0
Answer: 1.1
- Line up the decimal points
- 18.1 − 17.0 = 1.1
2.
39.3
+16.5
Answer: 55.8
- Line up the decimal points
- 39.3 + 16.5 = 55.8
3.
44.3
−16.1
Answer: 28.2
- Line up the decimal points
- 44.3 − 16.1 = 28.2
4.
34.9
+27.3
Answer: 62.2
- Line up the decimal points
- 34.9 + 27.3 = 62.2
5.
27.6
−7.0
Answer: 20.6
- Line up the decimal points
- 27.6 − 7.0 = 20.6
6.
12.5
+27.0
Answer: 39.5
- Line up the decimal points
- 12.5 + 27.0 = 39.5
7.
47.0
+12.6
Answer: 59.6
- Line up the decimal points
- 47.0 + 12.6 = 59.6
8.
36.0
−12.8
Answer: 23.2
- Line up the decimal points
- 36.0 − 12.8 = 23.2
9.
24.2
+2.9
Answer: 27.1
- Line up the decimal points
- 24.2 + 2.9 = 27.1
10.
15.4
+33.1
Answer: 48.5
- Line up the decimal points
- 15.4 + 33.1 = 48.5
11.
50.4
+11.0
Answer: 61.4
- Line up the decimal points
- 50.4 + 11.0 = 61.4
12.
15.8
+10.2
Answer: 26.0
- Line up the decimal points
- 15.8 + 10.2 = 26.0
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.