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2nd Grade Addition Within 100 worksheets

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Addition Within 100

Grade 2 Math Worksheet - Challenge Me

NameDate

Find the sum.

  1. 25 + 34 =

  2. 17 + 2 =

  3. 41 + 8 =

  4. 56 + 2 =

  5. 13 + 10 =

  6. 17 + 81 =

  7. 25 + 4 =

  8. 41 + 23 =

  9. 73 + 4 =

  10. 32 + 5 =

  11. 41 + 30 =

  12. 16 + 51 =

  13. 55 + 40 =

  14. 57 + 10 =

  15. 78 + 21 =

  16. 16 + 50 =

  17. 78 + 20 =

  18. 63 + 20 =

  19. 51 + 20 =

  20. 62 + 30 =

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2nd Grade Addition Within 100 worksheet 1 – printable PDF
Download PDF: 123456

About this worksheet

Adding within 100 is the heart of second grade arithmetic. This worksheet starts with the easier cases, where no ones add up to ten or more, so there is no regrouping. Some problems add two two-digit numbers, like 74 + 13. Some add a single digit, like 52 + 7. Some add a whole ten, like 36 + 40. The same idea works in every case: add the tens to the tens and the ones to the ones.

Children who see that can do all of these in their heads. Ask your child to say the parts out loud: 70 and 10 is 80, 4 and 3 is 7, so 74 + 13 is 87. Twenty problems on one page give plenty of practice, and none of the sums is 100 or more.

What your child will learn

  • Add tens to tens and ones to ones
  • Add a one-digit number or a whole ten to a two-digit number
  • Add within 100 without regrouping

Common Core standard: 2.NBT.B.5

Worked example

74 + 13: 70 + 10 = 80 and 4 + 3 = 7, so the sum is 87.

Common mistake

Adding the digits across, such as 7 + 4 + 1 + 3, instead of adding place by place.

Helpful hint

Add the tens, then add the ones.

Questions parents ask

What is the most common mistake with addition within 100?

Adding the digits across, such as 7 + 4 + 1 + 3, instead of adding place by place.

How can I help my child with addition within 100?

Add the tens, then add the ones.

Are these 2nd grade math worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

Similar: Two-Digit Addition · Three-Digit Addition With Regrouping

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