Year 4 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 4 decimals worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · DecimalsYear 4 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
301.70
+118.08
Answer: 419.78
- Line up the decimal points
- 301.70 + 118.08 = 419.78
2.
200.93
+91.22
Answer: 292.15
- Line up the decimal points
- 200.93 + 91.22 = 292.15
3.
240.90
+70.78
Answer: 311.68
- Line up the decimal points
- 240.90 + 70.78 = 311.68
4.
323.37
+23.35
Answer: 346.72
- Line up the decimal points
- 323.37 + 23.35 = 346.72
5.
396.50
−22.75
Answer: 373.75
- Line up the decimal points
- 396.50 − 22.75 = 373.75
6.
33.50
+82.12
Answer: 115.62
- Line up the decimal points
- 33.50 + 82.12 = 115.62
7.
136.99
−65.07
Answer: 71.92
- Line up the decimal points
- 136.99 − 65.07 = 71.92
8.
172.67
−89.81
Answer: 82.86
- Line up the decimal points
- 172.67 − 89.81 = 82.86
9.
218.09
+160.96
Answer: 379.05
- Line up the decimal points
- 218.09 + 160.96 = 379.05
10.
391.36
−12.52
Answer: 378.84
- Line up the decimal points
- 391.36 − 12.52 = 378.84
11.
388.15
+83.82
Answer: 471.97
- Line up the decimal points
- 388.15 + 83.82 = 471.97
12.
261.22
−78.35
Answer: 182.87
- Line up the decimal points
- 261.22 − 78.35 = 182.87
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.