6th Grade Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 6th Grade decimals worksheet.
6th Grade Adding and Subtracting Decimals Worksheet — Level 1 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
31.9
−19.8
Answer: 12.1
- Line up the decimal points
- 31.9 − 19.8 = 12.1
2.
20.1
+7.9
Answer: 28.0
- Line up the decimal points
- 20.1 + 7.9 = 28.0
3.
14.2
+21.3
Answer: 35.5
- Line up the decimal points
- 14.2 + 21.3 = 35.5
4.
5.8
+8.8
Answer: 14.6
- Line up the decimal points
- 5.8 + 8.8 = 14.6
5.
30.3
+25.2
Answer: 55.5
- Line up the decimal points
- 30.3 + 25.2 = 55.5
6.
23.4
+11.5
Answer: 34.9
- Line up the decimal points
- 23.4 + 11.5 = 34.9
7.
11.6
+10.3
Answer: 21.9
- Line up the decimal points
- 11.6 + 10.3 = 21.9
8.
1.2
+36.7
Answer: 37.9
- Line up the decimal points
- 1.2 + 36.7 = 37.9
9.
8.2
+23.3
Answer: 31.5
- Line up the decimal points
- 8.2 + 23.3 = 31.5
10.
45.6
−24.9
Answer: 20.7
- Line up the decimal points
- 45.6 − 24.9 = 20.7
11.
12.9
+35.3
Answer: 48.2
- Line up the decimal points
- 12.9 + 35.3 = 48.2
12.
58.0
+24.4
Answer: 82.4
- Line up the decimal points
- 58.0 + 24.4 = 82.4
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.