About this worksheet
Eight triangles, each with a whole at the top and its two parts at the bottom. For every triangle the child writes both subtraction sentences, so 13 with 9 and 4 becomes 13 - 9 = 4 and 13 - 4 = 9. A worked example sits at the top, and every whole is 20 or less.
Fact triangles show that subtraction is just splitting a whole into its parts, which is why they are such a good way into fluency within 20. A child who can see both sentences hiding in one triangle is ready for timed practice.
What students will practice
- Subtract within 20
- See how a whole splits into two parts
- Write two subtraction sentences from one fact family
Details
- Grade level
- Grade 2
- Subject
- Math · Subtraction
- Standard
- CCSS 2.OA.B.2
- Pages
- 1
- Format
- PDF · US Letter and A4 included
- License
- Free for classroom use · Attribution appreciated
- Last updated
- October 19, 2026
