Let’s solve each addition problem step by step. We’re adding two-digit numbers, and some will require “carrying” — that means when the ones digits add up to 10 or more, we carry the extra ten over to the tens column.
We’ll go row by row, left to right.
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First Row:
1.
41 + 78
- Ones: 1 + 8 = 9 → write 9
- Tens: 4 + 7 = 11 → write 11
→ Answer:
119
2.
28 + 17
- Ones: 8 + 7 = 15 → write 5, carry 1
- Tens: 2 + 1 + 1 (carried) = 4
→ Answer:
45
3.
82 + 57
- Ones: 2 + 7 = 9 → write 9
- Tens: 8 + 5 = 13 → write 13
→ Answer:
139
4.
28 + 53
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 2 + 5 + 1 = 8
→ Answer:
81
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Second Row:
5.
28 + 54
- Ones: 8 + 4 = 12 → write 2, carry 1
- Tens: 2 + 5 + 1 = 8
→ Answer:
82
6.
45 + 66
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 4 + 6 + 1 = 11 → write 11
→ Answer:
111
7.
44 + 38
- Ones: 4 + 8 = 12 → write 2, carry 1
- Tens: 4 + 3 + 1 = 8
→ Answer:
82
8.
32 + 86
- Ones: 2 + 6 = 8 → write 8
- Tens: 3 + 8 = 11 → write 11
→ Answer:
118
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Third Row:
9.
38 + 83
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 3 + 8 + 1 = 12 → write 12
→ Answer:
121
10.
24 + 77
- Ones: 4 + 7 = 11 → write 1, carry 1
- Tens: 2 + 7 + 1 = 10 → write 10
→ Answer:
101
11.
27 + 67
- Ones: 7 + 7 = 14 → write 4, carry 1
- Tens: 2 + 6 + 1 = 9
→ Answer:
94
12.
61 + 39
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 6 + 3 + 1 = 10 → write 10
→ Answer:
100
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Fourth Row:
13.
72 + 28
- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 7 + 2 + 1 = 10 → write 10
→ Answer:
100
14.
85 + 36
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 8 + 3 + 1 = 12 → write 12
→ Answer:
121
15.
86 + 45
- Ones: 6 + 5 = 11 → write 1, carry 1
- Tens: 8 + 4 + 1 = 13 → write 13
→ Answer:
131
16.
18 + 67
- Ones: 8 + 7 = 15 → write 5, carry 1
- Tens: 1 + 6 + 1 = 8
→ Answer:
85
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Final Answer:
119, 45, 139, 81, 82, 111, 82, 118, 121, 101, 94, 100, 100, 121, 131, 85
Parent Tip: Review the logic above to help your child master the concept of addition worksheet two digit.
