Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 818 · 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. 1.46 + 68 + 68 + 74 =
2. 2.71 + 44 + 19 + 80 =
3. 3.54 + 47 + 34 + 85 =
4. 4.82 + 85 + 45 + 65 =
5. 5.27 + 57 + 73 + 41 =
6. 6.26 + 33 + 12 + 23 =
7. 7.22 + 36 + 36 + 80 =
8. 8.15 + 36 + 27 + 21 =
9. 9.24 + 51 + 28 + 58 =
10. 10.17 + 85 + 87 + 73 =
11. 11.80 + 19 + 75 + 15 =
12. 12.83 + 38 + 76 + 85 =
13. 13.76 + 42 + 57 + 76 =
14. 14.49 + 36 + 77 + 23 =
15. 15.31 + 87 + 85 + 52 =
16. 16.86 + 36 + 87 + 59 =
17. 17.38 + 40 + 17 + 77 =
18. 18.16 + 62 + 53 + 25 =
19. 19.74 + 17 + 62 + 67 =
20. 20.15 + 36 + 36 + 17 =
21. 21.62 + 57 + 47 + 83 =
22. 22.51 + 89 + 62 + 84 =
23. 23.57 + 31 + 29 + 55 =
24. 24.13 + 80 + 16 + 27 =
25. 25.75 + 31 + 73 + 16 =
26. 26.58 + 14 + 17 + 33 =
27. 27.63 + 28 + 16 + 85 =
28. 28.16 + 44 + 78 + 53 =
29. 29.20 + 14 + 52 + 16 =
30. 30.14 + 58 + 21 + 82 =
31. 31.84 + 21 + 39 + 33 =
32. 32.30 + 37 + 85 + 61 =
33. 33.85 + 65 + 18 + 52 =
34. 34.53 + 58 + 81 + 30 =
35. 35.83 + 30 + 11 + 37 =
36. 36.63 + 77 + 57 + 13 =
37. 37.53 + 40 + 46 + 57 =
38. 38.79 + 62 + 38 + 62 =
39. 39.57 + 76 + 40 + 25 =
40. 40.22 + 18 + 21 + 28 =

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