Growing fluency
Addition within 20
Practice addition with sums up to 20. Get printable worksheets with answers, a worked example and a customizable generator.
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Addition with numbers from 0 to 20
Add two selected operands from zero through twenty; sums may reach forty when both operands are near the top of the range.
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Add each pair. The numbers being added are from 0 to 20, so remember that a sum can be greater than 20.
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Customize this worksheetLearning objective
What this activity builds
Add values through 20 using place value, make-ten facts, or counting on.
Worked example
What is 18 + 16?
34
Take 2 from 16 to make 18 into 20; 20 + 14 = 34.
Teaching notes
Make the practice count
- State clearly that the selected range describes the addends, not a ceiling for the answer.
- Use ten-frames or bundled tens to separate tens from ones.
Make it yours
Customize the practice
Choose your options, update the preview, then download the exact same pages.
Leaving an addend group empty selects the full 0–20 range when you update the preview.
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A useful next step
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Add vertical pairs drawn from selected ranges through 99, with space to regroup from ones into tens.
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