Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 171 · 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. 1.81 + 32 + 58 + 14 =
2. 2.71 + 51 + 85 + 20 =
3. 3.56 + 88 + 38 + 45 =
4. 4.21 + 54 + 54 + 64 =
5. 5.14 + 58 + 60 + 74 =
6. 6.64 + 63 + 57 + 34 =
7. 7.45 + 39 + 33 + 23 =
8. 8.34 + 65 + 17 + 12 =
9. 9.12 + 48 + 24 + 54 =
10. 10.71 + 21 + 64 + 62 =
11. 11.24 + 37 + 59 + 46 =
12. 12.17 + 37 + 37 + 55 =
13. 13.84 + 32 + 62 + 31 =
14. 14.21 + 74 + 14 + 75 =
15. 15.57 + 43 + 46 + 67 =
16. 16.69 + 85 + 43 + 55 =
17. 17.32 + 81 + 30 + 14 =
18. 18.68 + 13 + 26 + 15 =
19. 19.38 + 66 + 40 + 86 =
20. 20.74 + 73 + 74 + 48 =
21. 21.22 + 16 + 47 + 11 =
22. 22.28 + 34 + 15 + 75 =
23. 23.17 + 51 + 71 + 75 =
24. 24.72 + 57 + 58 + 31 =
25. 25.12 + 72 + 87 + 51 =
26. 26.12 + 32 + 17 + 89 =
27. 27.80 + 27 + 60 + 54 =
28. 28.13 + 66 + 80 + 72 =
29. 29.32 + 68 + 80 + 24 =
30. 30.30 + 24 + 88 + 65 =
31. 31.53 + 80 + 87 + 71 =
32. 32.15 + 73 + 35 + 61 =
33. 33.21 + 58 + 88 + 26 =
34. 34.12 + 18 + 57 + 42 =
35. 35.19 + 89 + 16 + 63 =
36. 36.19 + 31 + 24 + 36 =
37. 37.19 + 67 + 77 + 49 =
38. 38.62 + 24 + 26 + 61 =
39. 39.47 + 71 + 57 + 51 =
40. 40.82 + 30 + 87 + 45 =

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