Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 915 · 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. 1.46 + 41 + 30 + 15 =
2. 2.20 + 78 + 27 + 21 =
3. 3.28 + 70 + 56 + 79 =
4. 4.80 + 25 + 24 + 80 =
5. 5.18 + 18 + 44 + 46 =
6. 6.25 + 57 + 14 + 21 =
7. 7.57 + 44 + 60 + 52 =
8. 8.41 + 11 + 71 + 17 =
9. 9.21 + 68 + 25 + 42 =
10. 10.58 + 71 + 35 + 30 =
11. 11.77 + 21 + 45 + 22 =
12. 12.34 + 17 + 13 + 43 =
13. 13.20 + 43 + 48 + 15 =
14. 14.54 + 43 + 57 + 31 =
15. 15.89 + 46 + 19 + 60 =
16. 16.87 + 79 + 14 + 11 =
17. 17.42 + 64 + 43 + 53 =
18. 18.83 + 89 + 70 + 84 =
19. 19.15 + 65 + 34 + 18 =
20. 20.82 + 42 + 61 + 17 =
21. 21.33 + 33 + 59 + 56 =
22. 22.33 + 29 + 60 + 34 =
23. 23.69 + 43 + 42 + 87 =
24. 24.84 + 19 + 64 + 37 =
25. 25.73 + 61 + 60 + 15 =
26. 26.71 + 52 + 49 + 43 =
27. 27.23 + 27 + 54 + 44 =
28. 28.43 + 89 + 28 + 11 =
29. 29.11 + 28 + 55 + 67 =
30. 30.82 + 84 + 75 + 88 =
31. 31.16 + 77 + 31 + 54 =
32. 32.46 + 80 + 16 + 26 =
33. 33.80 + 86 + 27 + 27 =
34. 34.46 + 50 + 40 + 51 =
35. 35.26 + 21 + 35 + 23 =
36. 36.67 + 49 + 81 + 88 =
37. 37.18 + 45 + 70 + 75 =
38. 38.82 + 59 + 76 + 22 =
39. 39.36 + 39 + 20 + 27 =
40. 40.46 + 81 + 67 + 26 =

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