4th Grade Adding and Subtracting Decimals Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the 4th Grade decimals worksheet.
4th Grade Adding and Subtracting Decimals Worksheet — Level 1 — Answers
Line up the decimal points before you add or subtract.
1.
19.1
−6.7
Answer: 12.4
- Line up the decimal points
- 19.1 − 6.7 = 12.4
2.
44.0
+35.5
Answer: 79.5
- Line up the decimal points
- 44.0 + 35.5 = 79.5
3.
47.1
−22.4
Answer: 24.7
- Line up the decimal points
- 47.1 − 22.4 = 24.7
4.
54.3
−8.2
Answer: 46.1
- Line up the decimal points
- 54.3 − 8.2 = 46.1
5.
49.5
−24.8
Answer: 24.7
- Line up the decimal points
- 49.5 − 24.8 = 24.7
6.
53.3
−10.0
Answer: 43.3
- Line up the decimal points
- 53.3 − 10.0 = 43.3
7.
35.1
+3.9
Answer: 39.0
- Line up the decimal points
- 35.1 + 3.9 = 39.0
8.
54.8
−10.2
Answer: 44.6
- Line up the decimal points
- 54.8 − 10.2 = 44.6
9.
38.2
−29.4
Answer: 8.8
- Line up the decimal points
- 38.2 − 29.4 = 8.8
10.
21.3
+37.6
Answer: 58.9
- Line up the decimal points
- 21.3 + 37.6 = 58.9
11.
44.9
−40.3
Answer: 4.6
- Line up the decimal points
- 44.9 − 40.3 = 4.6
12.
37.7
+2.5
Answer: 40.2
- Line up the decimal points
- 37.7 + 2.5 = 40.2
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.