Year 8 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 8 decimals worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · DecimalsYear 8 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 4 — Answers
Line up the decimal points before you add or subtract.
1.
216.05
+199.57
Answer: 415.62
- Line up the decimal points
- 216.05 + 199.57 = 415.62
2.
211.72
+55.26
Answer: 266.98
- Line up the decimal points
- 211.72 + 55.26 = 266.98
3.
96.50
−73.86
Answer: 22.64
- Line up the decimal points
- 96.50 − 73.86 = 22.64
4.
397.68
+59.83
Answer: 457.51
- Line up the decimal points
- 397.68 + 59.83 = 457.51
5.
49.35
−8.77
Answer: 40.58
- Line up the decimal points
- 49.35 − 8.77 = 40.58
6.
58.08
+145.77
Answer: 203.85
- Line up the decimal points
- 58.08 + 145.77 = 203.85
7.
234.38
−111.63
Answer: 122.75
- Line up the decimal points
- 234.38 − 111.63 = 122.75
8.
303.44
+147.74
Answer: 451.18
- Line up the decimal points
- 303.44 + 147.74 = 451.18
9.
198.69
+18.31
Answer: 217.00
- Line up the decimal points
- 198.69 + 18.31 = 217.00
10.
306.31
−115.02
Answer: 191.29
- Line up the decimal points
- 306.31 − 115.02 = 191.29
11.
358.52
+172.64
Answer: 531.16
- Line up the decimal points
- 358.52 + 172.64 = 531.16
12.
132.12
−30.94
Answer: 101.18
- Line up the decimal points
- 132.12 − 30.94 = 101.18
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.