Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 644 · 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. 1.26 + 43 + 79 + 86 =
2. 2.32 + 62 + 62 + 68 =
3. 3.30 + 11 + 52 + 11 =
4. 4.73 + 49 + 77 + 78 =
5. 5.43 + 47 + 20 + 41 =
6. 6.21 + 66 + 19 + 79 =
7. 7.21 + 57 + 89 + 34 =
8. 8.33 + 30 + 54 + 88 =
9. 9.13 + 57 + 22 + 34 =
10. 10.78 + 47 + 89 + 42 =
11. 11.18 + 49 + 78 + 57 =
12. 12.25 + 41 + 89 + 86 =
13. 13.78 + 71 + 51 + 65 =
14. 14.58 + 34 + 48 + 61 =
15. 15.27 + 68 + 71 + 79 =
16. 16.88 + 62 + 38 + 50 =
17. 17.59 + 73 + 82 + 49 =
18. 18.41 + 58 + 29 + 78 =
19. 19.27 + 25 + 54 + 21 =
20. 20.20 + 41 + 24 + 37 =
21. 21.31 + 24 + 11 + 22 =
22. 22.35 + 27 + 26 + 62 =
23. 23.62 + 20 + 51 + 28 =
24. 24.85 + 27 + 78 + 49 =
25. 25.64 + 85 + 71 + 61 =
26. 26.76 + 80 + 52 + 54 =
27. 27.27 + 46 + 17 + 21 =
28. 28.36 + 41 + 81 + 70 =
29. 29.61 + 17 + 15 + 22 =
30. 30.22 + 17 + 20 + 55 =
31. 31.61 + 81 + 87 + 54 =
32. 32.65 + 75 + 68 + 46 =
33. 33.48 + 26 + 60 + 53 =
34. 34.30 + 27 + 60 + 56 =
35. 35.44 + 62 + 68 + 63 =
36. 36.73 + 71 + 40 + 17 =
37. 37.33 + 88 + 42 + 16 =
38. 38.13 + 86 + 66 + 18 =
39. 39.33 + 20 + 14 + 39 =
40. 40.25 + 59 + 37 + 22 =

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