Two-Digit Addition With Some Regrouping - 100 Questions (A) - Free Printable

I'll solve the two-digit addition problems in your worksheet and explain the process.

## Two-Digit Addition with Regrouping

The key to solving these problems is understanding regrouping (also called carrying). When the sum of digits in a column is 10 or more, we carry the tens digit to the next column.

Step-by-Step Process:

1. Add the ones place digits first
2. If the sum is 10 or more, write down the ones digit and carry the tens digit to the tens column
3. Add the tens place digits (including any carried digit)
4. Write down the final sum

Let me solve the first few problems as examples:

Problem 1: 37 + 39
- Ones: 7 + 9 = 16 → write 6, carry 1
- Tens: 3 + 3 + 1 (carried) = 7
- Answer: 76

Problem 2: 14 + 24
- Ones: 4 + 4 = 8
- Tens: 1 + 2 = 3
- Answer: 38

Problem 3: 57 + 92
- Ones: 7 + 2 = 9
- Tens: 5 + 9 = 14
- Answer: 149

Now let me provide the complete solutions for all problems:

```
37 + 39 = 76 14 + 24 = 38 57 + 92 = 149 36 + 92 = 128 65 + 16 = 81
31 + 80 = 111 51 + 56 = 107 13 + 27 = 40 78 + 82 = 160 56 + 56 = 112
84 + 48 = 132 29 + 93 = 122 82 + 81 = 163 45 + 24 = 69 70 + 69 = 139
76 + 11 = 87 98 + 72 = 170 64 + 66 = 130 37 + 76 = 113 13 + 88 = 101
10 + 98 = 108 81 + 71 = 152 73 + 15 = 88 49 + 92 = 141 94 + 72 = 166
39 + 92 = 131 19 + 52 = 71 40 + 99 = 139 93 + 81 = 174 40 + 49 = 89
28 + 36 = 64 49 + 56 = 105 63 + 95 = 158 14 + 77 = 91 42 + 11 = 53
52 + 61 = 113 49 + 36 = 85 10 + 64 = 74 52 + 34 = 86 53 + 41 = 94
53 + 61 = 114 36 + 73 = 109 36 + 24 = 60 71 + 68 = 139 35 + 96 = 131
82 + 79 = 161 25 + 80 = 105 21 + 89 = 110 46 + 66 = 112 38 + 62 = 100
35 + 11 = 46 30 + 22 = 52 34 + 10 = 44 91 + 82 = 173 83 + 73 = 156
90 + 15 = 105 40 + 54 = 94 83 + 41 = 124 40 + 86 = 126 95 + 95 = 190
91 + 95 = 186 44 + 40 = 84 80 + 29 = 109 47 + 25 = 72 60 + 93 = 153
58 + 47 = 105 62 + 12 = 74 15 + 32 = 47 77 + 90 = 167 34 + 85 = 119
35 + 95 = 130 73 + 93 = 166 47 + 83 = 130 28 + 16 = 44 65 + 51 = 116
85 + 97 = 182 63 + 83 = 146 88 + 74 = 162 12 + 80 = 92 48 + 71 = 119
54 + 87 = 141 34 + 78 = 112 98 + 63 = 161 36 + 87 = 123 80 + 36 = 116
43 + 52 = 95 85 + 27 = 112 39 + 64 = 103 14 + 23 = 37 76 + 67 = 143
41 + 51 = 92 28 + 83 = 111 30 + 40 = 70 22 + 90 = 112 45 + 52 = 97
30 + 17 = 47 45 + 95 = 140 79 + 20 = 99 40 + 42 = 82
```

Key Points About Regrouping:

- When to regroup: When adding the ones column, if the sum is 10 or more
- Carrying process: The tens digit from the ones column sum becomes part of the tens column
- Practice tip: Always add right to left (ones first, then tens)

For example, in 57 + 92:
- 7 + 2 = 9 (no regrouping needed)
- 5 + 9 = 14, so write 4 and carry 1
- Final answer: 149

This worksheet helps build fluency with two-digit addition and reinforces the concept of place value through regrouping.