Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 275 · 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. 1.17 + 32 + 88 + 29 =
2. 2.35 + 56 + 60 + 29 =
3. 3.82 + 88 + 32 + 42 =
4. 4.58 + 36 + 39 + 45 =
5. 5.30 + 27 + 20 + 38 =
6. 6.83 + 76 + 28 + 48 =
7. 7.63 + 28 + 62 + 49 =
8. 8.82 + 34 + 49 + 33 =
9. 9.84 + 49 + 53 + 83 =
10. 10.12 + 16 + 47 + 67 =
11. 11.18 + 26 + 49 + 19 =
12. 12.40 + 63 + 83 + 52 =
13. 13.12 + 41 + 84 + 36 =
14. 14.76 + 77 + 88 + 84 =
15. 15.82 + 68 + 65 + 81 =
16. 16.12 + 58 + 51 + 37 =
17. 17.56 + 65 + 15 + 41 =
18. 18.38 + 76 + 71 + 28 =
19. 19.36 + 13 + 14 + 61 =
20. 20.52 + 60 + 38 + 25 =
21. 21.26 + 79 + 47 + 23 =
22. 22.71 + 80 + 72 + 64 =
23. 23.72 + 19 + 62 + 20 =
24. 24.11 + 86 + 45 + 71 =
25. 25.14 + 75 + 48 + 17 =
26. 26.26 + 81 + 14 + 27 =
27. 27.18 + 25 + 72 + 73 =
28. 28.54 + 62 + 65 + 53 =
29. 29.17 + 83 + 31 + 87 =
30. 30.27 + 35 + 13 + 22 =
31. 31.56 + 86 + 29 + 80 =
32. 32.88 + 79 + 78 + 37 =
33. 33.21 + 26 + 11 + 80 =
34. 34.38 + 33 + 64 + 21 =
35. 35.58 + 65 + 50 + 15 =
36. 36.33 + 19 + 53 + 75 =
37. 37.76 + 65 + 60 + 19 =
38. 38.45 + 49 + 43 + 15 =
39. 39.67 + 42 + 26 + 15 =
40. 40.45 + 75 + 76 + 25 =

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