Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 815 · 40 questions

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

1. 1.64 + 30 + 83 + 58 =
2. 2.88 + 25 + 11 + 86 =
3. 3.32 + 20 + 22 + 73 =
4. 4.27 + 73 + 41 + 50 =
5. 5.78 + 50 + 19 + 34 =
6. 6.19 + 17 + 47 + 18 =
7. 7.40 + 60 + 62 + 13 =
8. 8.55 + 58 + 82 + 61 =
9. 9.84 + 62 + 21 + 15 =
10. 10.89 + 47 + 59 + 23 =
11. 11.28 + 86 + 22 + 56 =
12. 12.71 + 32 + 12 + 27 =
13. 13.43 + 18 + 80 + 24 =
14. 14.72 + 41 + 36 + 11 =
15. 15.12 + 64 + 80 + 13 =
16. 16.73 + 58 + 47 + 77 =
17. 17.89 + 11 + 35 + 64 =
18. 18.20 + 63 + 45 + 52 =
19. 19.12 + 17 + 21 + 77 =
20. 20.70 + 15 + 71 + 38 =
21. 21.70 + 64 + 30 + 84 =
22. 22.21 + 88 + 12 + 89 =
23. 23.65 + 57 + 56 + 48 =
24. 24.22 + 75 + 51 + 32 =
25. 25.14 + 89 + 41 + 64 =
26. 26.15 + 51 + 41 + 60 =
27. 27.34 + 56 + 57 + 89 =
28. 28.46 + 89 + 73 + 23 =
29. 29.81 + 86 + 68 + 28 =
30. 30.55 + 69 + 51 + 84 =
31. 31.51 + 14 + 25 + 48 =
32. 32.14 + 30 + 82 + 24 =
33. 33.13 + 64 + 31 + 76 =
34. 34.29 + 83 + 76 + 39 =
35. 35.84 + 14 + 56 + 81 =
36. 36.24 + 34 + 60 + 76 =
37. 37.69 + 51 + 27 + 64 =
38. 38.22 + 45 + 68 + 48 =
39. 39.70 + 54 + 86 + 35 =
40. 40.79 + 35 + 64 + 55 =

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