Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 617 · 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. 1.70 + 49 + 88 + 64 =
2. 2.51 + 22 + 39 + 87 =
3. 3.13 + 64 + 88 + 20 =
4. 4.56 + 68 + 89 + 68 =
5. 5.13 + 12 + 14 + 39 =
6. 6.32 + 75 + 44 + 62 =
7. 7.11 + 30 + 75 + 12 =
8. 8.88 + 31 + 61 + 28 =
9. 9.67 + 61 + 46 + 31 =
10. 10.30 + 12 + 61 + 65 =
11. 11.81 + 31 + 62 + 28 =
12. 12.60 + 74 + 53 + 67 =
13. 13.46 + 72 + 25 + 33 =
14. 14.86 + 56 + 80 + 56 =
15. 15.83 + 46 + 82 + 20 =
16. 16.63 + 74 + 66 + 87 =
17. 17.72 + 41 + 63 + 14 =
18. 18.14 + 68 + 19 + 23 =
19. 19.28 + 42 + 69 + 65 =
20. 20.43 + 31 + 58 + 13 =
21. 21.20 + 85 + 77 + 27 =
22. 22.47 + 20 + 12 + 25 =
23. 23.70 + 82 + 13 + 74 =
24. 24.35 + 29 + 86 + 71 =
25. 25.14 + 62 + 72 + 47 =
26. 26.33 + 53 + 34 + 13 =
27. 27.29 + 59 + 33 + 59 =
28. 28.31 + 22 + 45 + 75 =
29. 29.30 + 68 + 15 + 58 =
30. 30.33 + 30 + 16 + 76 =
31. 31.23 + 22 + 75 + 56 =
32. 32.89 + 89 + 62 + 73 =
33. 33.78 + 51 + 78 + 87 =
34. 34.81 + 55 + 42 + 78 =
35. 35.89 + 70 + 89 + 47 =
36. 36.41 + 46 + 70 + 27 =
37. 37.33 + 43 + 80 + 12 =
38. 38.22 + 22 + 35 + 51 =
39. 39.82 + 47 + 50 + 33 =
40. 40.70 + 23 + 66 + 42 =

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