πagarwalmath · 1st grade · Common Core 1.OA.C.6
➕ Add within 20
Add and subtract within 20 (fluent within 10)
Name: ______________________Date: ____________
1Make a ten: 9 + 9 = 9 + 1 + ?
Answer: ______________
2Make a ten: 6 + 7 = 6 + 4 + ?
Answer: ______________
3Near doubles: 6 + 6 = 12. So 6 + 5 = ?
Answer: ______________
47 + 9 = ?
Answer: ______________
5Near doubles: 9 + 9 = 18. So 9 + 8 = ?
Answer: ______________
67 + 8 = ?
Answer: ______________
77 + 4 = ?
Answer: ______________
86 + 5 = ?
Answer: ______________
99 + 9 = ?
Answer: ______________
1010 + 7 = ?
Answer: ______________
117 + 3 = ?
Answer: ______________
125 + 8 = ?
Answer: ______________
Answer key: Add within 20
- 1. 8
- 2. 3
- 3. 11
- 4. 16
- 5. 17
- 6. 15
- 7. 11
- 8. 11
- 9. 18
- 10. 17
- 11. 10
- 12. 13
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/1st-grade/add-within-20