Year 4 Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the Year 4 decimals worksheet.
Year 4 Adding and Subtracting Decimals Worksheet — Level 3 — Answers
Line up the decimal points before you add or subtract.
1.
240.53
+99.08
Answer: 339.61
- Line up the decimal points
- 240.53 + 99.08 = 339.61
2.
400.95
+192.93
Answer: 593.88
- Line up the decimal points
- 400.95 + 192.93 = 593.88
3.
194.31
−128.45
Answer: 65.86
- Line up the decimal points
- 194.31 − 128.45 = 65.86
4.
79.11
+65.69
Answer: 144.80
- Line up the decimal points
- 79.11 + 65.69 = 144.80
5.
190.77
+172.18
Answer: 362.95
- Line up the decimal points
- 190.77 + 172.18 = 362.95
6.
399.71
+116.25
Answer: 515.96
- Line up the decimal points
- 399.71 + 116.25 = 515.96
7.
333.33
+31.99
Answer: 365.32
- Line up the decimal points
- 333.33 + 31.99 = 365.32
8.
143.01
−73.63
Answer: 69.38
- Line up the decimal points
- 143.01 − 73.63 = 69.38
9.
60.80
+126.47
Answer: 187.27
- Line up the decimal points
- 60.80 + 126.47 = 187.27
10.
197.17
+26.91
Answer: 224.08
- Line up the decimal points
- 197.17 + 26.91 = 224.08
11.
172.47
−82.11
Answer: 90.36
- Line up the decimal points
- 172.47 − 82.11 = 90.36
12.
125.75
+7.75
Answer: 133.50
- Line up the decimal points
- 125.75 + 7.75 = 133.50
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.