Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 574 · 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. 1.22 + 73 + 70 + 22 =
2. 2.12 + 32 + 86 + 73 =
3. 3.55 + 78 + 25 + 63 =
4. 4.22 + 33 + 29 + 80 =
5. 5.89 + 18 + 22 + 64 =
6. 6.87 + 56 + 36 + 82 =
7. 7.61 + 85 + 33 + 21 =
8. 8.34 + 70 + 40 + 54 =
9. 9.70 + 81 + 21 + 80 =
10. 10.85 + 84 + 68 + 57 =
11. 11.58 + 53 + 51 + 23 =
12. 12.26 + 17 + 73 + 47 =
13. 13.86 + 27 + 58 + 56 =
14. 14.11 + 28 + 43 + 28 =
15. 15.37 + 28 + 45 + 87 =
16. 16.65 + 32 + 83 + 80 =
17. 17.28 + 29 + 36 + 42 =
18. 18.55 + 40 + 88 + 18 =
19. 19.77 + 32 + 23 + 22 =
20. 20.68 + 16 + 37 + 28 =
21. 21.69 + 77 + 13 + 56 =
22. 22.59 + 13 + 36 + 56 =
23. 23.82 + 22 + 23 + 58 =
24. 24.60 + 60 + 59 + 77 =
25. 25.42 + 39 + 28 + 71 =
26. 26.37 + 74 + 36 + 31 =
27. 27.31 + 59 + 36 + 49 =
28. 28.73 + 21 + 47 + 74 =
29. 29.31 + 13 + 64 + 72 =
30. 30.79 + 56 + 56 + 79 =
31. 31.81 + 86 + 75 + 67 =
32. 32.70 + 44 + 59 + 83 =
33. 33.29 + 66 + 34 + 65 =
34. 34.45 + 15 + 25 + 18 =
35. 35.62 + 84 + 47 + 18 =
36. 36.12 + 84 + 81 + 62 =
37. 37.18 + 65 + 37 + 56 =
38. 38.38 + 36 + 41 + 16 =
39. 39.81 + 20 + 33 + 41 =
40. 40.48 + 66 + 30 + 18 =

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