Addition within 20 Worksheets

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Math Worksheets
Lessons for First Grade
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Printable “1-digit Addition” worksheets:
Addition within 10 (eg. 3 + 5)
Addition within 20 (eg. 6 + 8)
Mixed Single Digit Addition
Sums across 10

Addition within 20 Worksheets

Learn addition with sums within 20.

First Grade worksheets to help students learn addition facts within 20. Practice single-digit addition with sums less than 20. Students can start with strategies like counting fingers, counting on or number bonds. With practice, they should be able to do the sums in their heads.

Lesson Objective:

  • Learn addition facts with sums less than or equal to 20.

Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Addition within 20 Worksheets.

Adding within 20 worksheet for First Grade

More Addition within 20 Worksheets

Add, then write the missing number.

(Answers on the second page)
Addition within 20 Worksheet #1
Addition within 20 Worksheet #2

Addition within 20 Worksheet #1 (Interactive)
Addition within 20 Worksheet #2 (Interactive)

Addition within 10 (eg. 3 + 5)
Mixed Single Digit Addition

More Printable Worksheets

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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