Subtract 1 within 20: Vertical Subtraction Worksheet

This subtract 1 within 20 worksheet has a set of problems curated to ensure that your child becomes more proficient in subtraction. After learning how to add, students should learn how to subtract numbers. There is lots of practice with subtraction in subtract 1 within 20 worksheet. This worksheet is about practicing the column method in which numbers are written one on top of another. In this method, students use their place value understanding to solve the problems.