Year 4 Adding and Subtracting Decimals Worksheet — Level 3 — 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 3 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
381.60
+138.56
Answer: 520.16
- Line up the decimal points
- 381.60 + 138.56 = 520.16
2.
254.94
−145.23
Answer: 109.71
- Line up the decimal points
- 254.94 − 145.23 = 109.71
3.
59.96
−30.47
Answer: 29.49
- Line up the decimal points
- 59.96 − 30.47 = 29.49
4.
390.31
−186.02
Answer: 204.29
- Line up the decimal points
- 390.31 − 186.02 = 204.29
5.
393.30
+161.40
Answer: 554.70
- Line up the decimal points
- 393.30 + 161.40 = 554.70
6.
84.85
+30.75
Answer: 115.60
- Line up the decimal points
- 84.85 + 30.75 = 115.60
7.
89.69
−13.08
Answer: 76.61
- Line up the decimal points
- 89.69 − 13.08 = 76.61
8.
349.00
+41.21
Answer: 390.21
- Line up the decimal points
- 349.00 + 41.21 = 390.21
9.
217.48
+39.38
Answer: 256.86
- Line up the decimal points
- 217.48 + 39.38 = 256.86
10.
138.48
−134.60
Answer: 3.88
- Line up the decimal points
- 138.48 − 134.60 = 3.88
11.
247.35
+70.29
Answer: 317.64
- Line up the decimal points
- 247.35 + 70.29 = 317.64
12.
66.24
+82.94
Answer: 149.18
- Line up the decimal points
- 66.24 + 82.94 = 149.18
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.
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