Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 310 · 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. 1.75 + 21 + 63 + 17 =
2. 2.82 + 54 + 21 + 23 =
3. 3.20 + 89 + 89 + 55 =
4. 4.43 + 54 + 25 + 65 =
5. 5.75 + 33 + 30 + 83 =
6. 6.32 + 33 + 53 + 18 =
7. 7.46 + 86 + 43 + 22 =
8. 8.58 + 88 + 26 + 84 =
9. 9.54 + 66 + 15 + 36 =
10. 10.33 + 43 + 69 + 18 =
11. 11.12 + 30 + 18 + 46 =
12. 12.78 + 35 + 60 + 89 =
13. 13.30 + 56 + 64 + 41 =
14. 14.37 + 47 + 20 + 39 =
15. 15.82 + 89 + 63 + 89 =
16. 16.83 + 66 + 54 + 74 =
17. 17.77 + 14 + 48 + 67 =
18. 18.53 + 88 + 60 + 65 =
19. 19.34 + 53 + 44 + 32 =
20. 20.60 + 22 + 20 + 47 =
21. 21.79 + 27 + 77 + 52 =
22. 22.33 + 78 + 80 + 84 =
23. 23.27 + 29 + 87 + 65 =
24. 24.33 + 74 + 38 + 24 =
25. 25.26 + 87 + 31 + 89 =
26. 26.59 + 12 + 36 + 85 =
27. 27.22 + 50 + 24 + 75 =
28. 28.51 + 78 + 31 + 29 =
29. 29.27 + 28 + 17 + 70 =
30. 30.42 + 88 + 58 + 34 =
31. 31.11 + 35 + 14 + 32 =
32. 32.60 + 68 + 83 + 63 =
33. 33.21 + 87 + 47 + 13 =
34. 34.71 + 66 + 28 + 89 =
35. 35.26 + 78 + 53 + 78 =
36. 36.74 + 17 + 15 + 67 =
37. 37.49 + 33 + 32 + 87 =
38. 38.64 + 78 + 84 + 21 =
39. 39.29 + 72 + 73 + 62 =
40. 40.20 + 33 + 14 + 89 =

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