Practice Packet Printable K–5 math

Common Core 2.NBT.B.5

2-digit addition with regrouping

Add the ones column first. If it is 10 or more, write the extra ones and carry one ten into the tens column. Then add the tens, including that carried ten.

One worked example

38 + 27

  1. 8 + 7 = 15 ones. Write 5, carry 1 ten.
  2. 1 + 3 + 2 = 6 tens.
  3. The sum is 65.

Answer: 65

Fluently add within 100 using place value.

Easy

Add. Regroup a ten when the ones need it.

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1.

19 + 22

2.

45 + 65

3.

78 + 28

4.

24 + 97

5.

27 + 94

6.

64 + 87

Answer key
  1. 41
  2. 110
  3. 106
  4. 121
  5. 121
  6. 151

Medium

Add. Regroup a ten when the ones need it.

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1.

66 + 94

2.

99 + 17

3.

57 + 19

4.

76 + 36

5.

99 + 38

6.

89 + 51

7.

26 + 58

8.

77 + 33

9.

48 + 64

Answer key
  1. 160
  2. 116
  3. 76
  4. 112
  5. 137
  6. 140
  7. 84
  8. 110
  9. 112

Hard

Add. Regroup a ten when the ones need it.

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1.

55 + 97

2.

58 + 97

3.

19 + 84

4.

35 + 46

5.

49 + 81

6.

22 + 28

7.

49 + 23

8.

67 + 16

9.

67 + 48

10.

97 + 54

11.

25 + 86

12.

99 + 66

Answer key
  1. 152
  2. 155
  3. 103
  4. 81
  5. 130
  6. 50
  7. 72
  8. 83
  9. 115
  10. 151
  11. 111
  12. 165

Related skills

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