3rd Grade Addition Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 3rd Grade addition worksheet.
Success TutoringWorksheetsAnswer sheet3rd Grade · Mathematics · Addition3rd Grade Addition Worksheet — Level 1 — Practice Set 4 — Answers
Set out each sum in columns. Show any regrouping.
1.
309
+690
Answer: 999
- 9 + 0 = 9
- 0 + 9 = 9
- 3 + 6 = 9
2.
294
+414
Answer: 708
- 4 + 4 = 8
- 9 + 1 = 10 → write 0, carry 1
- 2 + 4 + 1 = 7
3.
382
+302
Answer: 684
- 2 + 2 = 4
- 8 + 0 = 8
- 3 + 3 = 6
4.
853
+146
Answer: 999
- 3 + 6 = 9
- 5 + 4 = 9
- 8 + 1 = 9
5.
219
+701
Answer: 920
- 9 + 1 = 10 → write 0, carry 1
- 1 + 0 + 1 = 2
- 2 + 7 = 9
6.
175
+393
Answer: 568
- 5 + 3 = 8
- 7 + 9 = 16 → write 6, carry 1
- 1 + 3 + 1 = 5
7.
209
+116
Answer: 325
- 9 + 6 = 15 → write 5, carry 1
- 0 + 1 + 1 = 2
- 2 + 1 = 3
8.
208
+143
Answer: 351
- 8 + 3 = 11 → write 1, carry 1
- 0 + 4 + 1 = 5
- 2 + 1 = 3
9.
235
+764
Answer: 999
- 5 + 4 = 9
- 3 + 6 = 9
- 2 + 7 = 9
10.
669
+154
Answer: 823
- 9 + 4 = 13 → write 3, carry 1
- 6 + 5 + 1 = 12 → write 2, carry 1
- 6 + 1 + 1 = 8
11.
532
+312
Answer: 844
- 2 + 2 = 4
- 3 + 1 = 4
- 5 + 3 = 8
12.
704
+199
Answer: 903
- 4 + 9 = 13 → write 3, carry 1
- 0 + 9 + 1 = 10 → write 0, carry 1
- 7 + 1 + 1 = 9
13.
546
+308
Answer: 854
- 6 + 8 = 14 → write 4, carry 1
- 4 + 0 + 1 = 5
- 5 + 3 = 8
14.
299
+605
Answer: 904
- 9 + 5 = 14 → write 4, carry 1
- 9 + 0 + 1 = 10 → write 0, carry 1
- 2 + 6 + 1 = 9
15.
747
+238
Answer: 985
- 7 + 8 = 15 → write 5, carry 1
- 4 + 3 + 1 = 8
- 7 + 2 = 9
16.
105
+894
Answer: 999
- 5 + 4 = 9
- 0 + 9 = 9
- 1 + 8 = 9
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.