Year 7 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 7 decimals worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · DecimalsYear 7 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
26.64
+30.67
Answer: 57.31
- Line up the decimal points
- 26.64 + 30.67 = 57.31
2.
260.06
−17.49
Answer: 242.57
- Line up the decimal points
- 260.06 − 17.49 = 242.57
3.
142.46
+105.16
Answer: 247.62
- Line up the decimal points
- 142.46 + 105.16 = 247.62
4.
339.72
−119.39
Answer: 220.33
- Line up the decimal points
- 339.72 − 119.39 = 220.33
5.
92.08
+105.25
Answer: 197.33
- Line up the decimal points
- 92.08 + 105.25 = 197.33
6.
199.78
−50.31
Answer: 149.47
- Line up the decimal points
- 199.78 − 50.31 = 149.47
7.
390.01
−196.37
Answer: 193.64
- Line up the decimal points
- 390.01 − 196.37 = 193.64
8.
187.74
+66.82
Answer: 254.56
- Line up the decimal points
- 187.74 + 66.82 = 254.56
9.
330.98
+194.70
Answer: 525.68
- Line up the decimal points
- 330.98 + 194.70 = 525.68
10.
211.29
−140.17
Answer: 71.12
- Line up the decimal points
- 211.29 − 140.17 = 71.12
11.
232.57
−88.49
Answer: 144.08
- Line up the decimal points
- 232.57 − 88.49 = 144.08
12.
77.09
+41.96
Answer: 119.05
- Line up the decimal points
- 77.09 + 41.96 = 119.05
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.