Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 961 · 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. 1.19 + 13 + 30 + 68 =
2. 2.53 + 71 + 30 + 81 =
3. 3.64 + 31 + 84 + 75 =
4. 4.64 + 16 + 80 + 82 =
5. 5.53 + 17 + 77 + 49 =
6. 6.19 + 67 + 76 + 34 =
7. 7.32 + 16 + 36 + 82 =
8. 8.68 + 34 + 88 + 21 =
9. 9.45 + 45 + 63 + 30 =
10. 10.24 + 22 + 66 + 88 =
11. 11.76 + 79 + 46 + 65 =
12. 12.65 + 59 + 71 + 50 =
13. 13.71 + 35 + 76 + 61 =
14. 14.50 + 29 + 22 + 53 =
15. 15.31 + 14 + 24 + 29 =
16. 16.59 + 17 + 27 + 11 =
17. 17.73 + 83 + 28 + 19 =
18. 18.75 + 42 + 83 + 20 =
19. 19.72 + 79 + 33 + 53 =
20. 20.37 + 15 + 70 + 41 =
21. 21.61 + 20 + 68 + 12 =
22. 22.82 + 16 + 28 + 26 =
23. 23.27 + 27 + 57 + 34 =
24. 24.46 + 75 + 52 + 11 =
25. 25.45 + 39 + 24 + 12 =
26. 26.13 + 85 + 67 + 86 =
27. 27.27 + 80 + 78 + 33 =
28. 28.81 + 14 + 31 + 20 =
29. 29.73 + 30 + 23 + 37 =
30. 30.72 + 39 + 11 + 47 =
31. 31.56 + 41 + 35 + 37 =
32. 32.70 + 49 + 48 + 67 =
33. 33.30 + 88 + 80 + 28 =
34. 34.52 + 74 + 26 + 76 =
35. 35.24 + 35 + 57 + 41 =
36. 36.68 + 32 + 74 + 32 =
37. 37.49 + 11 + 17 + 33 =
38. 38.88 + 35 + 82 + 16 =
39. 39.50 + 70 + 43 + 74 =
40. 40.22 + 56 + 71 + 63 =

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