Year 4 Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 4 decimals worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · DecimalsYear 4 Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
28.1
−7.6
Answer: 20.5
- Line up the decimal points
- 28.1 − 7.6 = 20.5
2.
11.1
+19.3
Answer: 30.4
- Line up the decimal points
- 11.1 + 19.3 = 30.4
3.
29.4
+10.5
Answer: 39.9
- Line up the decimal points
- 29.4 + 10.5 = 39.9
4.
54.1
−39.9
Answer: 14.2
- Line up the decimal points
- 54.1 − 39.9 = 14.2
5.
56.3
+23.9
Answer: 80.2
- Line up the decimal points
- 56.3 + 23.9 = 80.2
6.
54.2
+24.5
Answer: 78.7
- Line up the decimal points
- 54.2 + 24.5 = 78.7
7.
37.6
−26.6
Answer: 11.0
- Line up the decimal points
- 37.6 − 26.6 = 11.0
8.
13.4
+31.3
Answer: 44.7
- Line up the decimal points
- 13.4 + 31.3 = 44.7
9.
47.9
+40.6
Answer: 88.5
- Line up the decimal points
- 47.9 + 40.6 = 88.5
10.
32.6
−31.3
Answer: 1.3
- Line up the decimal points
- 32.6 − 31.3 = 1.3
11.
20.4
+9.7
Answer: 30.1
- Line up the decimal points
- 20.4 + 9.7 = 30.1
12.
16.1
+33.2
Answer: 49.3
- Line up the decimal points
- 16.1 + 33.2 = 49.3
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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