Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 362 · 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. 1.20 + 68 + 32 + 32 =
2. 2.32 + 46 + 83 + 42 =
3. 3.75 + 66 + 12 + 46 =
4. 4.81 + 45 + 59 + 39 =
5. 5.33 + 59 + 12 + 35 =
6. 6.41 + 61 + 83 + 76 =
7. 7.38 + 57 + 86 + 28 =
8. 8.31 + 17 + 12 + 69 =
9. 9.72 + 21 + 40 + 78 =
10. 10.67 + 12 + 73 + 55 =
11. 11.26 + 81 + 29 + 35 =
12. 12.34 + 64 + 64 + 86 =
13. 13.63 + 34 + 82 + 47 =
14. 14.16 + 73 + 13 + 81 =
15. 15.12 + 42 + 19 + 61 =
16. 16.69 + 61 + 13 + 80 =
17. 17.14 + 22 + 86 + 57 =
18. 18.12 + 12 + 30 + 15 =
19. 19.31 + 89 + 82 + 75 =
20. 20.26 + 61 + 41 + 41 =
21. 21.63 + 15 + 36 + 13 =
22. 22.16 + 31 + 36 + 72 =
23. 23.56 + 17 + 18 + 45 =
24. 24.65 + 67 + 24 + 56 =
25. 25.52 + 12 + 53 + 84 =
26. 26.41 + 57 + 30 + 58 =
27. 27.48 + 43 + 28 + 64 =
28. 28.43 + 24 + 44 + 12 =
29. 29.57 + 11 + 12 + 14 =
30. 30.52 + 51 + 48 + 60 =
31. 31.74 + 54 + 14 + 47 =
32. 32.35 + 62 + 37 + 71 =
33. 33.89 + 68 + 65 + 32 =
34. 34.86 + 30 + 30 + 64 =
35. 35.84 + 86 + 25 + 62 =
36. 36.66 + 49 + 50 + 30 =
37. 37.57 + 31 + 53 + 64 =
38. 38.20 + 89 + 40 + 86 =
39. 39.15 + 31 + 26 + 43 =
40. 40.70 + 11 + 63 + 22 =

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