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Two-digit addition with regrouping worksheets

Twenty two-digit addition problems where at least one column carries, like 47 + 38, in three versions with keys. Built for the week students first learn to carry.

Addition: within 100 (two-digit)

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Add.

Sheet AFree at teach.peabody.kids

Addition: within 100 (two-digit)

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Add.

Sheet BFree at teach.peabody.kids

Addition: within 100 (two-digit)

NameDate

Add.

Sheet CFree at teach.peabody.kids

Answer key

Sheet A

  1. 100
  2. 54
  3. 93
  4. 64
  5. 90
  6. 70
  7. 96
  8. 91
  9. 62
  10. 73
  11. 75
  12. 91
  13. 100
  14. 95
  15. 81
  16. 100
  17. 92
  18. 81
  19. 100
  20. 91

Sheet B

  1. 92
  2. 92
  3. 46
  4. 80
  5. 81
  6. 100
  7. 95
  8. 81
  9. 42
  10. 100
  11. 92
  12. 64
  13. 90
  14. 53
  15. 100
  16. 91
  17. 63
  18. 71
  19. 30
  20. 94

Sheet C

  1. 100
  2. 60
  3. 75
  4. 72
  5. 80
  6. 100
  7. 94
  8. 73
  9. 56
  10. 94
  11. 61
  12. 100
  13. 93
  14. 100
  15. 82
  16. 100
  17. 90
  18. 90
  19. 84
  20. 90
Answer keyFree at teach.peabody.kids

Addition: 20 problems a sheet, 3 versions that do not repeat each other where the numbers allow.

How to use it

  1. Look at the sheet: it is a real, printable sheet. Switch between Sheet A, B and C, or press New numbers (N) for a fresh set.
  2. Change how many problems, how many versions, and whether the key prints. Settings stay in this browser; Share copies a link that rebuilds the same sheets.
  3. Press Print sheet A and key, or Print all. The answer key prints on its own page, so you can keep it back.

Ideas for class

  • Have students write the carried ten in a different color so it stands out and is not mistaken for an answer.
  • Ask for an estimate first on every third problem. A check that 85 is close to 90 catches forgotten carries.
  • Keep one printed key at the front of the room. Students check their own work, and the questions they ask show where the idea has not landed.

Related

Questions

Can the total reach 100?

Yes, 100 is the largest total allowed, as in 72 + 28, so a carry into the hundreds place is the most that can happen. For bigger totals, use the three-digit addition sheet.

Is regrouping the same as carrying?

Yes. Carrying is what many parents call it; regrouping is the word most schools use, because it describes trading ten ones for one ten.

Are the answer keys checked?

Each answer is worked out by the code that wrote the problem, and our tests recompute every answer a second way and compare. Please still look over the key before you grade a class set.

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What this worksheet covers

In these problems the ones digits add to ten or more, so a ten has to be traded up into the tens column. Every problem on the sheet needs that move at least once, so each one is a repetition of the idea that matters: ten ones make one ten. The layout is stacked, with a line, and room for students to write the small carried digit.

Who it is for

Second grade, under Common Core 2.NBT.B.5 and 2.NBT.B.7. It should follow the sheet without regrouping, and it prepares students for three-digit addition in third grade, where the same carry happens twice.

Adding two-digit numbers where at least one column carries · grade 2

A worked example

47 + 38. Ones: 7 + 8 = 15, which is 1 ten and 5 ones, so write 5 and carry the 1. Tens: 4 + 3 + 1 = 8. The answer is 85. Ask students to check by estimating: 47 is near 50, 38 is near 40, and 90 is close to 85.

Mistakes to watch for

  • Forgetting the carried ten, so 47 + 38 becomes 75. Estimating shows the answer is too small.
  • Writing the whole 15 in the ones column. Ask how many digits can sit in one column.

Make it your own

This sheet is one setting of the math worksheet generator. Open it there to change the skill, the range of numbers or the heading, or to mix several skills on one sheet.