Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 505 · 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. 1.14 + 56 + 45 + 61 =
2. 2.68 + 45 + 67 + 52 =
3. 3.20 + 71 + 19 + 78 =
4. 4.79 + 67 + 27 + 21 =
5. 5.21 + 25 + 80 + 83 =
6. 6.48 + 45 + 18 + 48 =
7. 7.12 + 56 + 19 + 20 =
8. 8.59 + 59 + 60 + 35 =
9. 9.74 + 61 + 71 + 32 =
10. 10.32 + 47 + 72 + 53 =
11. 11.34 + 61 + 41 + 76 =
12. 12.62 + 72 + 85 + 38 =
13. 13.18 + 31 + 39 + 21 =
14. 14.15 + 43 + 43 + 18 =
15. 15.26 + 89 + 20 + 23 =
16. 16.76 + 74 + 77 + 28 =
17. 17.69 + 26 + 56 + 60 =
18. 18.46 + 32 + 80 + 44 =
19. 19.25 + 14 + 68 + 53 =
20. 20.84 + 46 + 31 + 66 =
21. 21.15 + 50 + 19 + 43 =
22. 22.36 + 46 + 82 + 77 =
23. 23.40 + 67 + 26 + 13 =
24. 24.35 + 25 + 41 + 29 =
25. 25.82 + 47 + 68 + 52 =
26. 26.67 + 61 + 12 + 48 =
27. 27.37 + 61 + 24 + 61 =
28. 28.67 + 12 + 40 + 67 =
29. 29.57 + 84 + 25 + 36 =
30. 30.85 + 58 + 83 + 23 =
31. 31.79 + 23 + 15 + 16 =
32. 32.33 + 79 + 78 + 39 =
33. 33.83 + 23 + 58 + 16 =
34. 34.86 + 53 + 76 + 75 =
35. 35.37 + 29 + 48 + 41 =
36. 36.58 + 65 + 31 + 54 =
37. 37.71 + 21 + 70 + 79 =
38. 38.32 + 20 + 67 + 27 =
39. 39.17 + 32 + 67 + 73 =
40. 40.39 + 78 + 62 + 74 =

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