Printable addition worksheet for practicing two-digit math problems.

Let’s solve each addition problem step by step. We’ll add the ones place first, then the tens place. If the sum in the ones place is 10 or more, we carry over to the tens place — but looking at these problems, none of them require carrying (all ones digits add to less than 10).

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1) 51 + 42
Ones: 1 + 2 = 3
Tens: 5 + 4 = 9
→ 93

2) 37 + 42
Ones: 7 + 2 = 9
Tens: 3 + 4 = 7
→ 79

3) 42 + 36
Ones: 2 + 6 = 8
Tens: 4 + 3 = 7
→ 78

4) 52 + 34
Ones: 2 + 4 = 6
Tens: 5 + 3 = 8
→ 86

5) 33 + 35
Ones: 3 + 5 = 8
Tens: 3 + 3 = 6
→ 68

6) 27 + 62
Ones: 7 + 2 = 9
Tens: 2 + 6 = 8
→ 89

7) 11 + 34
Ones: 1 + 4 = 5
Tens: 1 + 3 = 4
→ 45

8) 67 + 12
Ones: 7 + 2 = 9
Tens: 6 + 1 = 7
→ 79

9) 34 + 42
Ones: 4 + 2 = 6
Tens: 3 + 4 = 7
→ 76

10) 23 + 45
Ones: 3 + 5 = 8
Tens: 2 + 4 = 6
→ 68

11) 34 + 25
Ones: 4 + 5 = 9
Tens: 3 + 2 = 5
→ 59

12) 42 + 31
Ones: 2 + 1 = 3
Tens: 4 + 3 = 7
→ 73

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Final Answer:
1) 93
2) 79
3) 78
4) 86
5) 68
6) 89
7) 45
8) 79
9) 76
10) 68
11) 59
12) 73