5th Grade Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 5th Grade decimals worksheet.
5th Grade Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Line up the decimal points before you add or subtract.
1.
340.68
+188.35
Answer: 529.03
- Line up the decimal points
- 340.68 + 188.35 = 529.03
2.
99.46
−74.39
Answer: 25.07
- Line up the decimal points
- 99.46 − 74.39 = 25.07
3.
315.14
−91.66
Answer: 223.48
- Line up the decimal points
- 315.14 − 91.66 = 223.48
4.
171.46
−23.62
Answer: 147.84
- Line up the decimal points
- 171.46 − 23.62 = 147.84
5.
19.28
+96.80
Answer: 116.08
- Line up the decimal points
- 19.28 + 96.80 = 116.08
6.
140.07
+46.47
Answer: 186.54
- Line up the decimal points
- 140.07 + 46.47 = 186.54
7.
251.78
+147.01
Answer: 398.79
- Line up the decimal points
- 251.78 + 147.01 = 398.79
8.
174.47
−152.53
Answer: 21.94
- Line up the decimal points
- 174.47 − 152.53 = 21.94
9.
71.35
+44.05
Answer: 115.40
- Line up the decimal points
- 71.35 + 44.05 = 115.40
10.
211.90
−31.41
Answer: 180.49
- Line up the decimal points
- 211.90 − 31.41 = 180.49
11.
209.09
+187.38
Answer: 396.47
- Line up the decimal points
- 209.09 + 187.38 = 396.47
12.
288.96
+17.89
Answer: 306.85
- Line up the decimal points
- 288.96 + 17.89 = 306.85
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.