Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 243 · 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. 1.31 + 71 + 48 + 19 =
2. 2.22 + 29 + 73 + 44 =
3. 3.18 + 58 + 85 + 86 =
4. 4.66 + 50 + 18 + 39 =
5. 5.70 + 18 + 18 + 40 =
6. 6.27 + 20 + 78 + 20 =
7. 7.60 + 15 + 55 + 29 =
8. 8.57 + 51 + 25 + 78 =
9. 9.41 + 18 + 13 + 30 =
10. 10.62 + 15 + 19 + 73 =
11. 11.40 + 65 + 62 + 53 =
12. 12.56 + 30 + 41 + 29 =
13. 13.88 + 21 + 21 + 41 =
14. 14.78 + 21 + 25 + 19 =
15. 15.21 + 78 + 73 + 35 =
16. 16.72 + 53 + 60 + 50 =
17. 17.22 + 18 + 83 + 25 =
18. 18.55 + 61 + 65 + 17 =
19. 19.48 + 53 + 30 + 88 =
20. 20.55 + 20 + 15 + 14 =
21. 21.83 + 22 + 46 + 17 =
22. 22.83 + 23 + 48 + 32 =
23. 23.54 + 72 + 11 + 57 =
24. 24.21 + 36 + 12 + 33 =
25. 25.61 + 66 + 20 + 34 =
26. 26.36 + 42 + 72 + 40 =
27. 27.72 + 50 + 65 + 64 =
28. 28.79 + 33 + 86 + 16 =
29. 29.53 + 46 + 50 + 64 =
30. 30.66 + 87 + 36 + 23 =
31. 31.24 + 50 + 39 + 20 =
32. 32.81 + 54 + 14 + 77 =
33. 33.41 + 72 + 39 + 33 =
34. 34.17 + 57 + 79 + 32 =
35. 35.61 + 24 + 28 + 85 =
36. 36.62 + 26 + 43 + 11 =
37. 37.39 + 87 + 82 + 14 =
38. 38.73 + 69 + 50 + 84 =
39. 39.56 + 41 + 50 + 27 =
40. 40.40 + 62 + 88 + 56 =

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