Adding and Subtracting Within 20 Worksheet
This adding and subtracting within 20 worksheet gives first graders mixed addition and subtraction fact practice with a helpful number line. Includes a complete answer key for quick, no-prep math review.
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About this resource
Description
This Adding and Subtracting Within 20 Worksheet helps first graders build fast, flexible recall of their basic math facts. Adding and subtracting within 20 is a foundational first grade skill, and once children can add and take away within 20 with confidence, they are ready for two-digit math, word problems, and mental math strategies. This page gives kids focused, friendly practice with both addition and subtraction facts in one place.
Designed as a no-prep first grade addition and subtraction worksheet, this printable is simple to use at school or at home. Students solve a set of vertical problems, then finish a row of horizontal equations, using the included 0–20 number line as a strategy tool to count on and count back. Just print it and hand it out, and the built-in answer key makes checking work quick and easy.
What’s Included
- 1 print-ready PDF worksheet
- Answer key
- 17 mixed addition and subtraction problems within 20
- A 0–20 number line strategy aid
There are three big reasons this resource works. First, mixing addition and subtraction on the same page helps children see how the two operations are related, which strengthens number sense. Second, the number line gives kids a concrete strategy to count on and count back, so they are never stuck. Third, this Adding and Subtracting Within 20 Worksheet keeps the layout clean and uncluttered, so young learners can focus on one problem at a time and build real fact fluency.
Teachers and parents can extend this skill in playful ways. Use dice or playing cards to create new problems within 20, then act them out with counters, blocks, or small toys. Turn fact practice into a game with short, friendly timed rounds, or have children write their own equations for a partner to solve. Pairing hands-on activities with this worksheet helps the facts stick.
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