Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 827 · 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. 1.87 + 15 + 27 + 77 =
2. 2.83 + 22 + 30 + 20 =
3. 3.69 + 54 + 51 + 24 =
4. 4.39 + 35 + 88 + 44 =
5. 5.86 + 77 + 47 + 16 =
6. 6.71 + 62 + 75 + 16 =
7. 7.23 + 33 + 18 + 24 =
8. 8.73 + 18 + 26 + 43 =
9. 9.17 + 58 + 26 + 51 =
10. 10.71 + 43 + 56 + 65 =
11. 11.33 + 35 + 27 + 23 =
12. 12.41 + 62 + 13 + 13 =
13. 13.51 + 78 + 25 + 85 =
14. 14.34 + 24 + 32 + 66 =
15. 15.26 + 79 + 51 + 45 =
16. 16.54 + 85 + 70 + 45 =
17. 17.29 + 47 + 33 + 33 =
18. 18.79 + 76 + 32 + 77 =
19. 19.64 + 15 + 36 + 40 =
20. 20.41 + 67 + 45 + 11 =
21. 21.57 + 31 + 15 + 46 =
22. 22.11 + 30 + 63 + 73 =
23. 23.17 + 31 + 28 + 58 =
24. 24.13 + 71 + 45 + 55 =
25. 25.72 + 40 + 77 + 12 =
26. 26.57 + 22 + 65 + 69 =
27. 27.16 + 74 + 76 + 13 =
28. 28.73 + 65 + 38 + 63 =
29. 29.25 + 21 + 45 + 88 =
30. 30.67 + 64 + 84 + 71 =
31. 31.62 + 28 + 65 + 67 =
32. 32.15 + 56 + 60 + 28 =
33. 33.52 + 30 + 20 + 87 =
34. 34.31 + 21 + 65 + 34 =
35. 35.79 + 56 + 85 + 55 =
36. 36.23 + 45 + 67 + 26 =
37. 37.52 + 75 + 36 + 68 =
38. 38.35 + 13 + 48 + 76 =
39. 39.24 + 74 + 12 + 80 =
40. 40.17 + 37 + 66 + 33 =

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