Year 7 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 4 — 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 4 — Answers
Line up the decimal points before you add or subtract.
1.
231.98
+166.20
Answer: 398.18
- Line up the decimal points
- 231.98 + 166.20 = 398.18
2.
172.04
−53.33
Answer: 118.71
- Line up the decimal points
- 172.04 − 53.33 = 118.71
3.
371.06
−102.93
Answer: 268.13
- Line up the decimal points
- 371.06 − 102.93 = 268.13
4.
57.80
+34.92
Answer: 92.72
- Line up the decimal points
- 57.80 + 34.92 = 92.72
5.
80.18
+101.51
Answer: 181.69
- Line up the decimal points
- 80.18 + 101.51 = 181.69
6.
162.26
+13.53
Answer: 175.79
- Line up the decimal points
- 162.26 + 13.53 = 175.79
7.
307.23
−199.18
Answer: 108.05
- Line up the decimal points
- 307.23 − 199.18 = 108.05
8.
159.47
−44.86
Answer: 114.61
- Line up the decimal points
- 159.47 − 44.86 = 114.61
9.
400.78
−125.36
Answer: 275.42
- Line up the decimal points
- 400.78 − 125.36 = 275.42
10.
197.75
−97.96
Answer: 99.79
- Line up the decimal points
- 197.75 − 97.96 = 99.79
11.
229.06
−107.81
Answer: 121.25
- Line up the decimal points
- 229.06 − 107.81 = 121.25
12.
279.76
+145.80
Answer: 425.56
- Line up the decimal points
- 279.76 + 145.80 = 425.56
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.