Preview of the printable adding within 20 worksheet
Age 6 to 7 Grade 1 Math

Addition Within 20 Worksheet

Free grade 1 addition worksheet: 20 sums within 20 to build fact fluency. Printable PDF with answer key.

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A4UK, Europe, Asia and most countries US LetterUSA and Canada
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Page 2 of the PDF is the answer key.

How to help your child

  • Making 10 first helps: 8 + 5 is 8 + 2 + 3.
  • The answer key is on page 2 of the PDF.

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