Printable subtraction worksheets within 20 – grade 1 (hard) worksheet for kids. Free PDF download and answer key included.
1. 15 - 7 = ___
2. 18 - 9 = ___
3. 14 - 6 = ___
4. 17 - 8 = ___
5. 13 - 5 = ___
6. 19 - 11 = ___
7. 16 - 7 = ___
8. 12 - 4 = ___
9. 20 - 13 = ___
10. 15 - 8 = ___
11. 18 - 10 = ___
12. 14 - 9 = ___
13. 17 - 9 = ___
14. 13 - 7 = ___
15. 19 - 12 = ___