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Addition Within 20 Worksheet

Grade 1 Math · printable worksheet (PDF) with answer key · 14 problems · CCSS 1.OA.C.6

A printable grade 1 addition within 20 practice worksheet with 14 problems and a complete, step-by-step answer key — formatted to print cleanly on standard paper. Included in the one-time $20 unlock for the full NudgeLearn library.

Sample problems

Make a ten first, then add the rest. Write the sum on the line.

1. $8 + 2 =$
2. $9 + 1 =$
3. $10 + 4 =$
4. $10 + 7 =$

Plus 10 more problems and a full answer key in the PDF.

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