Double-Digit Addition - Free Worksheet for Kids - SKOOLGO - Free Printable

Let’s go through each addition problem one by one. We’ll add the two numbers together carefully, starting from the right (ones place) and moving to the left (tens place). If the sum in any column is 10 or more, we carry over the extra digit to the next column.

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Problem ①: 45 + 98

- Ones: 5 + 8 = 13 → write down 3, carry 1
- Tens: 4 + 9 = 13, plus carried 1 = 14 → write down 14
→ 143

Problem ②: 12 + 33

- Ones: 2 + 3 = 5
- Tens: 1 + 3 = 4
→ 45

Problem ③: 52 + 28

- Ones: 2 + 8 = 10 → write down 0, carry 1
- Tens: 5 + 2 = 7, plus carried 1 = 8
→ 80

Problem ④: 19 + 66

- Ones: 9 + 6 = 15 → write down 5, carry 1
- Tens: 1 + 6 = 7, plus carried 1 = 8
→ 85

Problem ⑤: 47 + 39

- Ones: 7 + 9 = 16 → write down 6, carry 1
- Tens: 4 + 3 = 7, plus carried 1 = 8
→ 86

Problem ⑥: 91 + 78

- Ones: 1 + 8 = 9
- Tens: 9 + 7 = 16 → write down 16
→ 169

Problem ⑦: 21 + 89

- Ones: 1 + 9 = 10 → write down 0, carry 1
- Tens: 2 + 8 = 10, plus carried 1 = 11 → write down 11
→ 110

Problem ⑧: 15 + 55

- Ones: 5 + 5 = 10 → write down 0, carry 1
- Tens: 1 + 5 = 6, plus carried 1 = 7
→ 70

Problem ⑨: 67 + 23

- Ones: 7 + 3 = 10 → write down 0, carry 1
- Tens: 6 + 2 = 8, plus carried 1 = 9
→ 90

Problem ⑩: 27 + 21

- Ones: 7 + 1 = 8
- Tens: 2 + 2 = 4
→ 48

Problem ⑪: 55 + 79

- Ones: 5 + 9 = 14 → write down 4, carry 1
- Tens: 5 + 7 = 12, plus carried 1 = 13 → write down 13
→ 134

Problem ⑫: 84 + 14

- Ones: 4 + 4 = 8
- Tens: 8 + 1 = 9
→ 98

Problem ⑬: 46 + 46

- Ones: 6 + 6 = 12 → write down 2, carry 1
- Tens: 4 + 4 = 8, plus carried 1 = 9
→ 92

Problem ⑭: 93 + 95

- Ones: 3 + 5 = 8
- Tens: 9 + 9 = 18 → write down 18
→ 188

Problem ⑮: 88 + 55

- Ones: 8 + 5 = 13 → write down 3, carry 1
- Tens: 8 + 5 = 13, plus carried 1 = 14 → write down 14
→ 143

Problem ⑯: 22 + 47

- Ones: 2 + 7 = 9
- Tens: 2 + 4 = 6
→ 69

Problem ⑰: 47 + 13

- Ones: 7 + 3 = 10 → write down 0, carry 1
- Tens: 4 + 1 = 5, plus carried 1 = 6
→ 60

Problem ⑱: 52 + 36

- Ones: 2 + 6 = 8
- Tens: 5 + 3 = 8
→ 88

Problem ⑲: 87 + 31

- Ones: 7 + 1 = 8
- Tens: 8 + 3 = 11 → write down 11
→ 118

Problem ⑳: 76 + 39

- Ones: 6 + 9 = 15 → write down 5, carry 1
- Tens: 7 + 3 = 10, plus carried 1 = 11 → write down 11
→ 115

Problem ㉑: 37 + 67

- Ones: 7 + 7 = 14 → write down 4, carry 1
- Tens: 3 + 6 = 9, plus carried 1 = 10 → write down 10
→ 104

Problem ㉒: 19 + 29

- Ones: 9 + 9 = 18 → write down 8, carry 1
- Tens: 1 + 2 = 3, plus carried 1 = 4
→ 48

Problem ㉓: 41 + 51

- Ones: 1 + 1 = 2
- Tens: 4 + 5 = 9
→ 92

Problem ㉔: 74 + 38

- Ones: 4 + 8 = 12 → write down 2, carry 1
- Tens: 7 + 3 = 10, plus carried 1 = 11 → write down 11
→ 112

Problem ㉕: 58 + 95

- Ones: 8 + 5 = 13 → write down 3, carry 1
- Tens: 5 + 9 = 14, plus carried 1 = 15 → write down 15
→ 153

All answers have been double-checked for accuracy.

Final Answer:
① 143
② 45
③ 80
④ 85
⑤ 86
⑥ 169
⑦ 110
⑧ 70
⑨ 90
⑩ 48
⑪ 134
⑫ 98
⑬ 92
⑭ 188
⑮ 143
⑯ 69
⑰ 60
⑱ 88
⑲ 118
⑳ 115
㉑ 104
㉒ 48
㉓ 92
㉔ 112
㉕ 153