Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 150 · 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. 1.35 + 72 + 80 + 71 =
2. 2.63 + 35 + 13 + 67 =
3. 3.19 + 70 + 75 + 63 =
4. 4.23 + 65 + 62 + 42 =
5. 5.83 + 75 + 67 + 13 =
6. 6.80 + 22 + 42 + 75 =
7. 7.18 + 69 + 86 + 76 =
8. 8.55 + 47 + 67 + 36 =
9. 9.66 + 37 + 38 + 29 =
10. 10.58 + 72 + 21 + 18 =
11. 11.11 + 19 + 32 + 70 =
12. 12.72 + 28 + 81 + 49 =
13. 13.54 + 52 + 61 + 21 =
14. 14.13 + 59 + 62 + 17 =
15. 15.79 + 83 + 48 + 33 =
16. 16.52 + 40 + 60 + 75 =
17. 17.48 + 72 + 85 + 11 =
18. 18.61 + 27 + 59 + 23 =
19. 19.49 + 17 + 78 + 84 =
20. 20.47 + 80 + 45 + 66 =
21. 21.61 + 33 + 61 + 24 =
22. 22.15 + 23 + 39 + 87 =
23. 23.40 + 30 + 67 + 54 =
24. 24.19 + 11 + 31 + 68 =
25. 25.83 + 74 + 89 + 18 =
26. 26.52 + 78 + 62 + 44 =
27. 27.18 + 24 + 13 + 28 =
28. 28.19 + 39 + 80 + 24 =
29. 29.89 + 32 + 89 + 58 =
30. 30.21 + 34 + 60 + 39 =
31. 31.59 + 61 + 46 + 40 =
32. 32.64 + 85 + 55 + 15 =
33. 33.44 + 34 + 25 + 32 =
34. 34.35 + 19 + 65 + 73 =
35. 35.63 + 23 + 69 + 65 =
36. 36.66 + 13 + 70 + 76 =
37. 37.56 + 60 + 52 + 59 =
38. 38.84 + 76 + 14 + 31 =
39. 39.89 + 67 + 56 + 12 =
40. 40.75 + 52 + 37 + 40 =

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