Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 981 · 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. 1.18 + 14 + 44 + 26 =
2. 2.31 + 57 + 88 + 23 =
3. 3.33 + 39 + 85 + 34 =
4. 4.63 + 12 + 15 + 83 =
5. 5.56 + 89 + 74 + 62 =
6. 6.24 + 69 + 15 + 48 =
7. 7.20 + 88 + 18 + 77 =
8. 8.65 + 20 + 48 + 78 =
9. 9.62 + 62 + 42 + 60 =
10. 10.78 + 62 + 28 + 38 =
11. 11.27 + 65 + 52 + 44 =
12. 12.29 + 55 + 72 + 16 =
13. 13.32 + 75 + 73 + 89 =
14. 14.11 + 85 + 45 + 24 =
15. 15.72 + 47 + 28 + 49 =
16. 16.48 + 77 + 20 + 33 =
17. 17.14 + 40 + 24 + 85 =
18. 18.27 + 14 + 63 + 73 =
19. 19.17 + 39 + 42 + 29 =
20. 20.26 + 89 + 41 + 81 =
21. 21.25 + 33 + 65 + 19 =
22. 22.51 + 43 + 63 + 46 =
23. 23.29 + 42 + 65 + 84 =
24. 24.25 + 64 + 28 + 36 =
25. 25.82 + 46 + 40 + 78 =
26. 26.24 + 62 + 64 + 87 =
27. 27.44 + 81 + 60 + 55 =
28. 28.63 + 31 + 39 + 87 =
29. 29.33 + 63 + 39 + 28 =
30. 30.18 + 23 + 13 + 58 =
31. 31.86 + 75 + 28 + 25 =
32. 32.11 + 49 + 67 + 15 =
33. 33.14 + 55 + 44 + 13 =
34. 34.64 + 84 + 74 + 31 =
35. 35.32 + 66 + 68 + 48 =
36. 36.58 + 15 + 66 + 29 =
37. 37.28 + 82 + 84 + 15 =
38. 38.22 + 55 + 22 + 54 =
39. 39.31 + 62 + 69 + 37 =
40. 40.18 + 15 + 72 + 88 =

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