About this worksheet
Twelve subtraction equations, each with one number missing. In the left column the box sits in the middle (12 − ? = 8), and in the right column it comes first (? − 3 = 7), so a child meets both kinds of puzzle on one page.
The second column is the trickier one, because the missing number is the biggest in the equation. A child who reasons “what minus 3 leaves 7?” usually gets there by adding, which is exactly the connection first grade is building.
A worked example sits at the top, and every number stays within 20.
What students will practice
- Find an unknown number in a subtraction equation
- Work with the unknown in different places
- Use addition to check a subtraction answer
Details
- Grade level
- Grade 1
- Subject
- Math · Subtraction
- Standard
- CCSS 1.OA.8
- Pages
- 1
- Format
- PDF · US Letter and A4 included
- License
- Free for classroom use · Attribution appreciated
- Last updated
- September 26, 2026
