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Grade 1 Addition and Subtraction Within 20 Worksheets

These free printable Grade 1 worksheets cover addition and subtraction within 20. Easy sets may use a smaller foundation range; each detail page states the range actually shown in its PDF.

What’s in this collection

62 free printable Grade 1 Math worksheets. Each one is a US Letter PDF with the answer key on its last page.

Skills covered:

Levels: Easy (22), Standard (20), Challenge (20). Start with an Easy set to check the skill, use Standard sets for regular practice, and save Challenge sets for review.

How to use these worksheets

  • Print at Actual size (100%) on US Letter paper.
  • Let the learner finish the activity pages before you check answers with the answer key page.
  • If most answers are correct, move up a level; if not, try another set at the same level.

Choose a skill

Addition Within 20

View all addition within 20 worksheets

Subtraction Within 20

View all subtraction within 20 worksheets

62 matching worksheets

Browse all 62 matching worksheets