Year 6 Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the Year 6 decimals worksheet.
Year 6 · Mathematics · Decimals
Year 6 Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Success Tutoring
Line up the decimal points before you add or subtract.
1.
140.90
+78.31
Answer: 219.21
- Line up the decimal points
- 140.90 + 78.31 = 219.21
2.
153.59
−7.01
Answer: 146.58
- Line up the decimal points
- 153.59 − 7.01 = 146.58
3.
333.54
+139.13
Answer: 472.67
- Line up the decimal points
- 333.54 + 139.13 = 472.67
4.
283.07
−141.59
Answer: 141.48
- Line up the decimal points
- 283.07 − 141.59 = 141.48
5.
31.61
−14.49
Answer: 17.12
- Line up the decimal points
- 31.61 − 14.49 = 17.12
6.
155.37
+149.36
Answer: 304.73
- Line up the decimal points
- 155.37 + 149.36 = 304.73
7.
209.25
+5.87
Answer: 215.12
- Line up the decimal points
- 209.25 + 5.87 = 215.12
8.
374.26
+37.11
Answer: 411.37
- Line up the decimal points
- 374.26 + 37.11 = 411.37
9.
132.46
−74.48
Answer: 57.98
- Line up the decimal points
- 132.46 − 74.48 = 57.98
10.
391.41
+150.91
Answer: 542.32
- Line up the decimal points
- 391.41 + 150.91 = 542.32
11.
302.92
−181.05
Answer: 121.87
- Line up the decimal points
- 302.92 − 181.05 = 121.87
12.
279.62
+160.78
Answer: 440.40
- Line up the decimal points
- 279.62 + 160.78 = 440.40
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.