Year 8 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 2 — 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 2 — Answers
Line up the decimal points before you add or subtract.
1.
170.67
+63.07
Answer: 233.74
- Line up the decimal points
- 170.67 + 63.07 = 233.74
2.
245.75
+136.10
Answer: 381.85
- Line up the decimal points
- 245.75 + 136.10 = 381.85
3.
78.66
+42.23
Answer: 120.89
- Line up the decimal points
- 78.66 + 42.23 = 120.89
4.
136.83
−103.13
Answer: 33.70
- Line up the decimal points
- 136.83 − 103.13 = 33.70
5.
158.80
−65.62
Answer: 93.18
- Line up the decimal points
- 158.80 − 65.62 = 93.18
6.
261.26
−78.02
Answer: 183.24
- Line up the decimal points
- 261.26 − 78.02 = 183.24
7.
250.77
−3.78
Answer: 246.99
- Line up the decimal points
- 250.77 − 3.78 = 246.99
8.
226.91
−98.43
Answer: 128.48
- Line up the decimal points
- 226.91 − 98.43 = 128.48
9.
107.18
−32.39
Answer: 74.79
- Line up the decimal points
- 107.18 − 32.39 = 74.79
10.
291.71
+65.10
Answer: 356.81
- Line up the decimal points
- 291.71 + 65.10 = 356.81
11.
97.30
−74.66
Answer: 22.64
- Line up the decimal points
- 97.30 − 74.66 = 22.64
12.
309.80
−16.49
Answer: 293.31
- Line up the decimal points
- 309.80 − 16.49 = 293.31
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.
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