3rd Grade Addition Worksheet — Getting Started — Practice Set 3 — Answers
Answer sheet with worked solutions for the 3rd Grade addition worksheet.
Success TutoringWorksheetsAnswer sheet3rd Grade · Mathematics · Addition3rd Grade Addition Worksheet — Getting Started — Practice Set 3 — Answers
Set out each sum in columns. Show any regrouping.
1.
67
+32
Answer: 99
- 7 + 2 = 9
- 6 + 3 = 9
2.
39
+17
Answer: 56
- 9 + 7 = 16 → write 6, carry 1
- 3 + 1 + 1 = 5
3.
84
+15
Answer: 99
- 4 + 5 = 9
- 8 + 1 = 9
4.
40
+47
Answer: 87
- 0 + 7 = 7
- 4 + 4 = 8
5.
65
+14
Answer: 79
- 5 + 4 = 9
- 6 + 1 = 7
6.
15
+40
Answer: 55
- 5 + 0 = 5
- 1 + 4 = 5
7.
81
+18
Answer: 99
- 1 + 8 = 9
- 8 + 1 = 9
8.
74
+25
Answer: 99
- 4 + 5 = 9
- 7 + 2 = 9
9.
51
+48
Answer: 99
- 1 + 8 = 9
- 5 + 4 = 9
10.
36
+53
Answer: 89
- 6 + 3 = 9
- 3 + 5 = 8
11.
79
+20
Answer: 99
- 9 + 0 = 9
- 7 + 2 = 9
12.
72
+25
Answer: 97
- 2 + 5 = 7
- 7 + 2 = 9
13.
16
+18
Answer: 34
- 6 + 8 = 14 → write 4, carry 1
- 1 + 1 + 1 = 3
14.
33
+33
Answer: 66
- 3 + 3 = 6
- 3 + 3 = 6
15.
24
+61
Answer: 85
- 4 + 1 = 5
- 2 + 6 = 8
16.
89
+10
Answer: 99
- 9 + 0 = 9
- 8 + 1 = 9
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
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