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.
303.34
+109.76
Answer: 413.10
- Line up the decimal points
- 303.34 + 109.76 = 413.10
2.
77.25
−3.33
Answer: 73.92
- Line up the decimal points
- 77.25 − 3.33 = 73.92
3.
349.39
+141.47
Answer: 490.86
- Line up the decimal points
- 349.39 + 141.47 = 490.86
4.
190.78
−150.48
Answer: 40.30
- Line up the decimal points
- 190.78 − 150.48 = 40.30
5.
214.81
−45.95
Answer: 168.86
- Line up the decimal points
- 214.81 − 45.95 = 168.86
6.
143.44
−87.84
Answer: 55.60
- Line up the decimal points
- 143.44 − 87.84 = 55.60
7.
350.91
+86.01
Answer: 436.92
- Line up the decimal points
- 350.91 + 86.01 = 436.92
8.
195.76
−76.56
Answer: 119.20
- Line up the decimal points
- 195.76 − 76.56 = 119.20
9.
12.41
+142.47
Answer: 154.88
- Line up the decimal points
- 12.41 + 142.47 = 154.88
10.
147.38
−98.51
Answer: 48.87
- Line up the decimal points
- 147.38 − 98.51 = 48.87
11.
316.48
+191.59
Answer: 508.07
- Line up the decimal points
- 316.48 + 191.59 = 508.07
12.
263.27
−194.14
Answer: 69.13
- Line up the decimal points
- 263.27 − 194.14 = 69.13
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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