Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 756 · 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. 1.53 + 34 + 34 + 33 =
2. 2.65 + 61 + 20 + 66 =
3. 3.85 + 42 + 37 + 85 =
4. 4.87 + 19 + 59 + 57 =
5. 5.40 + 11 + 47 + 48 =
6. 6.21 + 39 + 42 + 83 =
7. 7.24 + 85 + 73 + 81 =
8. 8.87 + 27 + 14 + 58 =
9. 9.69 + 27 + 86 + 25 =
10. 10.74 + 85 + 86 + 30 =
11. 11.89 + 28 + 16 + 29 =
12. 12.33 + 57 + 24 + 23 =
13. 13.78 + 46 + 54 + 82 =
14. 14.11 + 60 + 69 + 56 =
15. 15.46 + 16 + 63 + 41 =
16. 16.47 + 18 + 12 + 59 =
17. 17.47 + 25 + 71 + 74 =
18. 18.63 + 54 + 80 + 24 =
19. 19.52 + 11 + 80 + 73 =
20. 20.69 + 41 + 29 + 50 =
21. 21.42 + 33 + 72 + 56 =
22. 22.12 + 73 + 35 + 83 =
23. 23.49 + 40 + 70 + 47 =
24. 24.18 + 89 + 83 + 21 =
25. 25.73 + 38 + 47 + 39 =
26. 26.75 + 63 + 43 + 58 =
27. 27.15 + 19 + 51 + 56 =
28. 28.45 + 83 + 22 + 80 =
29. 29.44 + 53 + 23 + 38 =
30. 30.39 + 83 + 63 + 69 =
31. 31.37 + 42 + 49 + 21 =
32. 32.14 + 43 + 27 + 15 =
33. 33.75 + 45 + 59 + 70 =
34. 34.27 + 80 + 19 + 83 =
35. 35.11 + 44 + 46 + 23 =
36. 36.47 + 25 + 25 + 57 =
37. 37.30 + 12 + 33 + 32 =
38. 38.40 + 60 + 19 + 22 =
39. 39.11 + 28 + 17 + 25 =
40. 40.77 + 84 + 47 + 25 =

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