Year 7 Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the Year 7 decimals worksheet.
Year 7 Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Line up the decimal points before you add or subtract.
1.
58.68
−53.66
Answer: 5.02
- Line up the decimal points
- 58.68 − 53.66 = 5.02
2.
11.68
+200.75
Answer: 212.43
- Line up the decimal points
- 11.68 + 200.75 = 212.43
3.
261.31
−139.71
Answer: 121.60
- Line up the decimal points
- 261.31 − 139.71 = 121.60
4.
179.00
−8.86
Answer: 170.14
- Line up the decimal points
- 179.00 − 8.86 = 170.14
5.
236.92
+73.87
Answer: 310.79
- Line up the decimal points
- 236.92 + 73.87 = 310.79
6.
229.65
+96.26
Answer: 325.91
- Line up the decimal points
- 229.65 + 96.26 = 325.91
7.
311.67
−194.83
Answer: 116.84
- Line up the decimal points
- 311.67 − 194.83 = 116.84
8.
210.05
+111.62
Answer: 321.67
- Line up the decimal points
- 210.05 + 111.62 = 321.67
9.
166.12
−161.26
Answer: 4.86
- Line up the decimal points
- 166.12 − 161.26 = 4.86
10.
26.85
+9.35
Answer: 36.20
- Line up the decimal points
- 26.85 + 9.35 = 36.20
11.
122.29
−5.39
Answer: 116.90
- Line up the decimal points
- 122.29 − 5.39 = 116.90
12.
329.59
+13.39
Answer: 342.98
- Line up the decimal points
- 329.59 + 13.39 = 342.98
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.