πagarwalmath · 1st grade · Common Core 1.OA.C.6
➖ Subtract within 20
Add and subtract within 20 (fluent within 10)
Name: ______________________Date: ____________
1Start at 18 and count back 3. Where do you land? (18 − 3)
Answer: ______________
2Start at 17 and count back 3. Where do you land? (17 − 3)
Answer: ______________
36 − 5 = ?
Answer: ______________
4Start at 11 and count back 2. Where do you land? (11 − 2)
Answer: ______________
55 − 5 = ?
Answer: ______________
611 − 6 = ?
Answer: ______________
716 − 7 = ?
Answer: ______________
88 − 8 = ?
Answer: ______________
919 − 1 = ?
Answer: ______________
107 − 1 = ?
Answer: ______________
117 − 3 = ?
Answer: ______________
1217 − 1 = ?
Answer: ______________
Answer key: Subtract within 20
- 1. 15
- 2. 14
- 3. 1
- 4. 9
- 5. 0
- 6. 5
- 7. 9
- 8. 0
- 9. 18
- 10. 6
- 11. 4
- 12. 16
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/1st-grade/sub-within-20