Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 766 · 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. 1.38 + 77 + 38 + 64 =
2. 2.62 + 20 + 35 + 29 =
3. 3.84 + 23 + 48 + 31 =
4. 4.43 + 65 + 14 + 17 =
5. 5.23 + 43 + 74 + 17 =
6. 6.26 + 81 + 54 + 41 =
7. 7.54 + 22 + 22 + 50 =
8. 8.39 + 64 + 20 + 80 =
9. 9.81 + 38 + 20 + 21 =
10. 10.60 + 40 + 60 + 15 =
11. 11.56 + 35 + 70 + 62 =
12. 12.81 + 59 + 43 + 58 =
13. 13.62 + 87 + 59 + 22 =
14. 14.52 + 45 + 57 + 14 =
15. 15.29 + 64 + 39 + 88 =
16. 16.86 + 70 + 66 + 15 =
17. 17.76 + 29 + 21 + 31 =
18. 18.44 + 59 + 74 + 57 =
19. 19.40 + 36 + 78 + 31 =
20. 20.82 + 38 + 47 + 49 =
21. 21.16 + 22 + 14 + 16 =
22. 22.19 + 51 + 24 + 44 =
23. 23.32 + 57 + 60 + 47 =
24. 24.47 + 69 + 44 + 12 =
25. 25.48 + 70 + 60 + 23 =
26. 26.89 + 75 + 11 + 26 =
27. 27.77 + 84 + 38 + 21 =
28. 28.58 + 24 + 55 + 36 =
29. 29.14 + 83 + 38 + 25 =
30. 30.68 + 86 + 72 + 53 =
31. 31.86 + 75 + 60 + 41 =
32. 32.45 + 61 + 73 + 50 =
33. 33.29 + 70 + 40 + 21 =
34. 34.30 + 16 + 16 + 49 =
35. 35.25 + 48 + 65 + 39 =
36. 36.80 + 24 + 39 + 50 =
37. 37.37 + 67 + 48 + 40 =
38. 38.76 + 57 + 70 + 76 =
39. 39.34 + 36 + 61 + 86 =
40. 40.51 + 22 + 84 + 85 =

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