Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 959 · 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. 1.21 + 72 + 79 + 40 =
2. 2.29 + 45 + 64 + 26 =
3. 3.80 + 23 + 11 + 23 =
4. 4.42 + 63 + 65 + 71 =
5. 5.27 + 71 + 55 + 11 =
6. 6.15 + 53 + 75 + 40 =
7. 7.80 + 71 + 60 + 21 =
8. 8.38 + 61 + 61 + 62 =
9. 9.14 + 87 + 40 + 60 =
10. 10.21 + 79 + 68 + 69 =
11. 11.84 + 83 + 40 + 26 =
12. 12.42 + 87 + 66 + 70 =
13. 13.46 + 51 + 63 + 77 =
14. 14.50 + 36 + 40 + 11 =
15. 15.29 + 76 + 67 + 43 =
16. 16.58 + 41 + 26 + 62 =
17. 17.24 + 36 + 66 + 17 =
18. 18.54 + 66 + 23 + 16 =
19. 19.45 + 85 + 51 + 72 =
20. 20.57 + 59 + 68 + 82 =
21. 21.55 + 26 + 64 + 52 =
22. 22.73 + 44 + 70 + 34 =
23. 23.20 + 21 + 48 + 67 =
24. 24.66 + 34 + 51 + 47 =
25. 25.29 + 21 + 57 + 21 =
26. 26.19 + 21 + 69 + 68 =
27. 27.53 + 49 + 64 + 23 =
28. 28.58 + 32 + 24 + 37 =
29. 29.89 + 50 + 21 + 32 =
30. 30.52 + 31 + 77 + 20 =
31. 31.24 + 23 + 13 + 70 =
32. 32.67 + 32 + 48 + 53 =
33. 33.21 + 76 + 29 + 65 =
34. 34.78 + 33 + 13 + 53 =
35. 35.61 + 26 + 81 + 66 =
36. 36.65 + 23 + 65 + 57 =
37. 37.31 + 39 + 29 + 25 =
38. 38.31 + 57 + 80 + 54 =
39. 39.81 + 81 + 16 + 68 =
40. 40.69 + 18 + 89 + 26 =

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