7th Grade Adding and Subtracting Decimals Worksheet — Level 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 — Answers
Line up the decimal points before you add or subtract.
1.
198.63
−117.32
Answer: 81.31
- Line up the decimal points
- 198.63 − 117.32 = 81.31
2.
175.79
−47.87
Answer: 127.92
- Line up the decimal points
- 175.79 − 47.87 = 127.92
3.
132.89
+14.33
Answer: 147.22
- Line up the decimal points
- 132.89 + 14.33 = 147.22
4.
185.33
−112.61
Answer: 72.72
- Line up the decimal points
- 185.33 − 112.61 = 72.72
5.
375.80
+85.59
Answer: 461.39
- Line up the decimal points
- 375.80 + 85.59 = 461.39
6.
18.95
+114.59
Answer: 133.54
- Line up the decimal points
- 18.95 + 114.59 = 133.54
7.
163.14
+48.02
Answer: 211.16
- Line up the decimal points
- 163.14 + 48.02 = 211.16
8.
66.25
+183.81
Answer: 250.06
- Line up the decimal points
- 66.25 + 183.81 = 250.06
9.
393.99
−171.77
Answer: 222.22
- Line up the decimal points
- 393.99 − 171.77 = 222.22
10.
137.28
−39.47
Answer: 97.81
- Line up the decimal points
- 137.28 − 39.47 = 97.81
11.
201.71
+103.11
Answer: 304.82
- Line up the decimal points
- 201.71 + 103.11 = 304.82
12.
147.19
+176.93
Answer: 324.12
- Line up the decimal points
- 147.19 + 176.93 = 324.12
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.