0, 1, 2, 3, Doubles, Doubles +1, Sums of 10

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. 2+6=
2. 7+2=
3. 2+8=
4. 0+9=
5. 1+0=
6. 0+2=
7. 8+0=
8. 0+7=
9. 2+1=
10. 9+1=
11. 1+0=
12. 1+1=
13. 6+1=
14. 1+3=
15. 4+1=
16. 1+5=
17. 7+1=
18. 0+4=
19. 3+0=
20. 0+5=
21. 6+0=
22. 0+0=
23. 8+1=
24. 9+2=
25. 1+2=
26. 5+2=
27. 2+2=
28. 3+2=
29. 2+4=
30. 2+0=
31. 8+3=
32. 6+3=
33. 0+3=
34. 4+3=
35. 3+1=
36. 2+3=
37. 3+3=
38. 5+3=
39. 3+7=
40. 9+3=
41. 4+6=
42. 5+5=
43. 10+0=
44. 4+5=
45. 5+6=
46. 6+7=
47. 7+8=
48. 8+9=
49. 6+6=
50. 7+7=
51. 8+8=
52. 9+9=