Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 776 · 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. 1.45 + 41 + 25 + 52 =
2. 2.27 + 70 + 83 + 33 =
3. 3.24 + 16 + 26 + 88 =
4. 4.79 + 12 + 25 + 68 =
5. 5.63 + 42 + 15 + 81 =
6. 6.50 + 56 + 77 + 31 =
7. 7.85 + 27 + 42 + 19 =
8. 8.48 + 56 + 75 + 37 =
9. 9.19 + 79 + 37 + 68 =
10. 10.71 + 12 + 52 + 77 =
11. 11.57 + 26 + 31 + 62 =
12. 12.61 + 59 + 68 + 47 =
13. 13.70 + 21 + 31 + 66 =
14. 14.63 + 84 + 83 + 50 =
15. 15.13 + 76 + 56 + 78 =
16. 16.87 + 45 + 84 + 25 =
17. 17.83 + 69 + 25 + 16 =
18. 18.61 + 45 + 76 + 74 =
19. 19.41 + 59 + 63 + 84 =
20. 20.35 + 78 + 77 + 87 =
21. 21.12 + 36 + 17 + 14 =
22. 22.75 + 75 + 71 + 47 =
23. 23.53 + 16 + 71 + 72 =
24. 24.64 + 87 + 69 + 36 =
25. 25.86 + 17 + 88 + 44 =
26. 26.72 + 47 + 25 + 31 =
27. 27.41 + 39 + 23 + 13 =
28. 28.35 + 75 + 55 + 47 =
29. 29.11 + 62 + 83 + 67 =
30. 30.60 + 26 + 47 + 16 =
31. 31.39 + 47 + 27 + 79 =
32. 32.77 + 38 + 87 + 58 =
33. 33.45 + 89 + 33 + 53 =
34. 34.68 + 59 + 65 + 39 =
35. 35.22 + 16 + 54 + 23 =
36. 36.79 + 29 + 33 + 73 =
37. 37.63 + 20 + 42 + 59 =
38. 38.41 + 76 + 47 + 78 =
39. 39.44 + 34 + 19 + 85 =
40. 40.22 + 44 + 49 + 47 =

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