4th Grade Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 4th Grade decimals worksheet.
4th Grade Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 2 — Answers
Line up the decimal points before you add or subtract.
1.
28.6
−26.8
Answer: 1.8
- Line up the decimal points
- 28.6 − 26.8 = 1.8
2.
18.7
−13.4
Answer: 5.3
- Line up the decimal points
- 18.7 − 13.4 = 5.3
3.
50.9
−24.4
Answer: 26.5
- Line up the decimal points
- 50.9 − 24.4 = 26.5
4.
57.8
−15.6
Answer: 42.2
- Line up the decimal points
- 57.8 − 15.6 = 42.2
5.
33.6
−9.5
Answer: 24.1
- Line up the decimal points
- 33.6 − 9.5 = 24.1
6.
10.5
−9.0
Answer: 1.5
- Line up the decimal points
- 10.5 − 9.0 = 1.5
7.
21.8
+31.4
Answer: 53.2
- Line up the decimal points
- 21.8 + 31.4 = 53.2
8.
17.9
−14.7
Answer: 3.2
- Line up the decimal points
- 17.9 − 14.7 = 3.2
9.
36.5
+32.9
Answer: 69.4
- Line up the decimal points
- 36.5 + 32.9 = 69.4
10.
53.9
−38.5
Answer: 15.4
- Line up the decimal points
- 53.9 − 38.5 = 15.4
11.
28.5
+7.3
Answer: 35.8
- Line up the decimal points
- 28.5 + 7.3 = 35.8
12.
30.3
+4.8
Answer: 35.1
- Line up the decimal points
- 30.3 + 4.8 = 35.1
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.