The Subtraction Facts from 20 worksheet is a critical resource for 1st and 2nd graders focusing on mental math speed and memorization of core subtraction tables.

How to Solve Subtraction

Solve these by finding the difference between the starting number and the number being subtracted. A helpful strategy is to think of the related addition fact (e.g., for 15 - 8, think 'What plus 8 equals 15?').

You can view the preview of this worksheet below, or download the full high-resolution PDF along with the answer key for easy grading.