Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 723 · 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. 1.23 + 50 + 63 + 12 =
2. 2.77 + 28 + 30 + 53 =
3. 3.68 + 19 + 51 + 39 =
4. 4.42 + 55 + 24 + 89 =
5. 5.64 + 78 + 63 + 34 =
6. 6.13 + 57 + 53 + 45 =
7. 7.36 + 62 + 62 + 82 =
8. 8.43 + 50 + 31 + 53 =
9. 9.50 + 48 + 25 + 64 =
10. 10.12 + 82 + 24 + 40 =
11. 11.64 + 14 + 12 + 61 =
12. 12.50 + 54 + 23 + 66 =
13. 13.72 + 69 + 84 + 50 =
14. 14.40 + 69 + 68 + 27 =
15. 15.30 + 86 + 25 + 87 =
16. 16.60 + 53 + 80 + 45 =
17. 17.57 + 22 + 84 + 44 =
18. 18.59 + 36 + 63 + 78 =
19. 19.46 + 88 + 50 + 38 =
20. 20.28 + 11 + 28 + 80 =
21. 21.63 + 58 + 30 + 23 =
22. 22.80 + 53 + 74 + 32 =
23. 23.36 + 38 + 20 + 58 =
24. 24.37 + 15 + 18 + 50 =
25. 25.39 + 58 + 84 + 79 =
26. 26.57 + 19 + 84 + 79 =
27. 27.84 + 53 + 72 + 27 =
28. 28.35 + 82 + 48 + 74 =
29. 29.67 + 34 + 52 + 33 =
30. 30.46 + 76 + 88 + 77 =
31. 31.54 + 16 + 85 + 77 =
32. 32.70 + 79 + 58 + 11 =
33. 33.85 + 13 + 14 + 32 =
34. 34.58 + 78 + 64 + 53 =
35. 35.62 + 65 + 17 + 23 =
36. 36.43 + 81 + 78 + 33 =
37. 37.25 + 71 + 81 + 30 =
38. 38.66 + 37 + 65 + 41 =
39. 39.18 + 17 + 21 + 31 =
40. 40.58 + 52 + 39 + 89 =

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