Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 695 · 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. 1.89 + 11 + 11 + 57 =
2. 2.33 + 25 + 89 + 59 =
3. 3.52 + 30 + 64 + 89 =
4. 4.33 + 49 + 53 + 51 =
5. 5.47 + 73 + 17 + 12 =
6. 6.67 + 23 + 60 + 24 =
7. 7.65 + 49 + 80 + 62 =
8. 8.25 + 74 + 33 + 15 =
9. 9.23 + 33 + 88 + 51 =
10. 10.41 + 32 + 14 + 40 =
11. 11.29 + 70 + 36 + 42 =
12. 12.78 + 18 + 87 + 66 =
13. 13.12 + 20 + 61 + 48 =
14. 14.85 + 62 + 52 + 26 =
15. 15.21 + 70 + 34 + 30 =
16. 16.84 + 85 + 82 + 40 =
17. 17.52 + 62 + 43 + 20 =
18. 18.14 + 53 + 49 + 77 =
19. 19.65 + 45 + 46 + 25 =
20. 20.58 + 36 + 32 + 71 =
21. 21.55 + 89 + 74 + 63 =
22. 22.81 + 12 + 28 + 36 =
23. 23.43 + 66 + 28 + 61 =
24. 24.70 + 73 + 53 + 36 =
25. 25.88 + 50 + 40 + 83 =
26. 26.45 + 59 + 42 + 48 =
27. 27.67 + 56 + 49 + 27 =
28. 28.41 + 71 + 15 + 78 =
29. 29.65 + 12 + 71 + 34 =
30. 30.30 + 17 + 25 + 15 =
31. 31.31 + 13 + 46 + 59 =
32. 32.51 + 66 + 82 + 77 =
33. 33.56 + 86 + 86 + 43 =
34. 34.23 + 61 + 24 + 33 =
35. 35.34 + 86 + 64 + 47 =
36. 36.28 + 31 + 57 + 16 =
37. 37.85 + 43 + 78 + 27 =
38. 38.68 + 36 + 39 + 80 =
39. 39.79 + 24 + 26 + 16 =
40. 40.35 + 20 + 11 + 22 =

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