7th Grade Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 7th Grade decimals worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Decimals7th Grade Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
268.91
+117.75
Answer: 386.66
- Line up the decimal points
- 268.91 + 117.75 = 386.66
2.
87.45
+162.87
Answer: 250.32
- Line up the decimal points
- 87.45 + 162.87 = 250.32
3.
204.33
+132.22
Answer: 336.55
- Line up the decimal points
- 204.33 + 132.22 = 336.55
4.
255.80
+188.32
Answer: 444.12
- Line up the decimal points
- 255.80 + 188.32 = 444.12
5.
126.86
−88.63
Answer: 38.23
- Line up the decimal points
- 126.86 − 88.63 = 38.23
6.
265.76
−160.50
Answer: 105.26
- Line up the decimal points
- 265.76 − 160.50 = 105.26
7.
370.04
+96.10
Answer: 466.14
- Line up the decimal points
- 370.04 + 96.10 = 466.14
8.
376.18
+11.47
Answer: 387.65
- Line up the decimal points
- 376.18 + 11.47 = 387.65
9.
367.91
−123.38
Answer: 244.53
- Line up the decimal points
- 367.91 − 123.38 = 244.53
10.
41.47
−30.40
Answer: 11.07
- Line up the decimal points
- 41.47 − 30.40 = 11.07
11.
157.82
+88.41
Answer: 246.23
- Line up the decimal points
- 157.82 + 88.41 = 246.23
12.
215.42
+120.71
Answer: 336.13
- Line up the decimal points
- 215.42 + 120.71 = 336.13
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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