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.
249.36
+144.55
Answer: 393.91
- Line up the decimal points
- 249.36 + 144.55 = 393.91
2.
181.51
−38.96
Answer: 142.55
- Line up the decimal points
- 181.51 − 38.96 = 142.55
3.
58.44
+168.61
Answer: 227.05
- Line up the decimal points
- 58.44 + 168.61 = 227.05
4.
226.41
+62.11
Answer: 288.52
- Line up the decimal points
- 226.41 + 62.11 = 288.52
5.
343.20
−69.84
Answer: 273.36
- Line up the decimal points
- 343.20 − 69.84 = 273.36
6.
238.26
+124.16
Answer: 362.42
- Line up the decimal points
- 238.26 + 124.16 = 362.42
7.
325.41
+168.55
Answer: 493.96
- Line up the decimal points
- 325.41 + 168.55 = 493.96
8.
44.34
−36.57
Answer: 7.77
- Line up the decimal points
- 44.34 − 36.57 = 7.77
9.
52.64
+144.98
Answer: 197.62
- Line up the decimal points
- 52.64 + 144.98 = 197.62
10.
33.53
+136.57
Answer: 170.10
- Line up the decimal points
- 33.53 + 136.57 = 170.10
11.
192.92
+68.43
Answer: 261.35
- Line up the decimal points
- 192.92 + 68.43 = 261.35
12.
121.38
+70.55
Answer: 191.93
- Line up the decimal points
- 121.38 + 70.55 = 191.93
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.