Year 7 Adding and Subtracting Decimals Worksheet — Level 1 — 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 1 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
19.5
+39.5
Answer: 59.0
- Line up the decimal points
- 19.5 + 39.5 = 59.0
2.
52.1
+11.4
Answer: 63.5
- Line up the decimal points
- 52.1 + 11.4 = 63.5
3.
15.1
+25.4
Answer: 40.5
- Line up the decimal points
- 15.1 + 25.4 = 40.5
4.
15.1
−6.8
Answer: 8.3
- Line up the decimal points
- 15.1 − 6.8 = 8.3
5.
5.3
+26.0
Answer: 31.3
- Line up the decimal points
- 5.3 + 26.0 = 31.3
6.
56.6
−13.0
Answer: 43.6
- Line up the decimal points
- 56.6 − 13.0 = 43.6
7.
56.4
−25.9
Answer: 30.5
- Line up the decimal points
- 56.4 − 25.9 = 30.5
8.
58.6
+12.2
Answer: 70.8
- Line up the decimal points
- 58.6 + 12.2 = 70.8
9.
14.3
+7.1
Answer: 21.4
- Line up the decimal points
- 14.3 + 7.1 = 21.4
10.
21.7
+8.6
Answer: 30.3
- Line up the decimal points
- 21.7 + 8.6 = 30.3
11.
36.1
−22.3
Answer: 13.8
- Line up the decimal points
- 36.1 − 22.3 = 13.8
12.
23.6
+2.0
Answer: 25.6
- Line up the decimal points
- 23.6 + 2.0 = 25.6
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
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