Within 20 Addition Worksheet

This worksheet is for early elementary students practicing addition within 20. It includes two pages in letter PDF format, with name and date lines, a note that says “Try making ten first,” and two-column practice rows labeled Problem and Answer. The problems include equations such as 2 + 6, 9 + 4, 9 + 6, and 3 + 4, with space to write each answer.

Free printable · PDF

2 pages
US Letter — choose “Fit to page” for A4
PDF, 61 KB

Download free PDF

Free for personal, family and classroom use.

Use the first page for independent practice, classwork, or homework. The second page is an answer key with numbered problems, equations, and answers for quick checking. Print both pages for grading support or just the student page for practice.

Good for

Daily addition fact practice
Homework on sums within 20
Quick answer-checking with key

Tip: Print double-sided to keep the worksheet and answer key together.

10 files · PDF, DOCX, XLSX

Get every sheet: Addition Worksheets Pack

This sheet plus 9 more in one download, with the editable Word and Excel files. Printable addition worksheets with answer keys: within 10, number lines, within 20, doubles, two-digit with and without regrouping, three-digit, three addends and word problems, plus an Excel fact-fluency tracker.

$5.00 USD, one-time 10 files · about $0.50 each