Number Line Subtraction Worksheet Within 20

About this worksheet

A clean number line subtraction worksheet with a cheerful frog theme. Children read each problem, hop backward along the 1 to 19 number line, and write the difference in the box. The number line gives kids a concrete way to see subtraction as counting back.

Thirty-three problems within 20. Great as a strategy lesson before moving to written facts, or as steady practice once counting back is familiar.

What students will practice

• Subtract within 20 on a number line
• Practice counting back to subtract
• Connect the number line to subtraction facts

Details

Grade level

Grade 1

Subject

Math · Subtraction

Pages

1

Format

PDF · US Letter and A4 included

License

Free for classroom use · Attribution appreciated

Last updated

June 24, 2026