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Math · Grade 1

Grade 1 Addition Within 20

Free printable Grade 1 addition within 20 worksheets with 1–50 problems and an answer key.

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This skill has 121 unique problems. Larger worksheets repeat problems in a fixed order.
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Grade 1 Addition Within 20

Solve each addition problem. Write the sum on the line.

1.  7 + 13 =
2.  1 + 19 =
3.  3 + 12 =
4.  2 + 10 =
5.  0 + 17 =
6.  5 + 7 =
7.  6 + 12 =
8.  0 + 0 =
9.  4 + 5 =
10.  3 + 8 =

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What students practice

Build addition fluency through addition within 20 practice.

How to use it

Solve each addition problem. Write the sum on the line. Preview the page, then print or download it. If you want the same randomized set later, save the version code.

Create another version

Math Worksheet Generator · Kindergarten–Grade 5

More practice in Math

  • Addition Within 10 · Practice addition facts with sums up to 10. Create a new set and download the answer key.
  • Grade 1 Subtraction Within 20 · Free printable Grade 1 subtraction within 20 worksheets with 1–50 problems and an answer key.

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