Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 547 · 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. 1.88 + 65 + 88 + 80 =
2. 2.33 + 35 + 47 + 87 =
3. 3.44 + 85 + 31 + 38 =
4. 4.48 + 29 + 61 + 55 =
5. 5.58 + 51 + 29 + 80 =
6. 6.69 + 76 + 32 + 77 =
7. 7.22 + 31 + 26 + 11 =
8. 8.87 + 36 + 53 + 11 =
9. 9.57 + 16 + 20 + 34 =
10. 10.38 + 34 + 38 + 49 =
11. 11.15 + 44 + 64 + 47 =
12. 12.82 + 32 + 31 + 56 =
13. 13.86 + 41 + 16 + 12 =
14. 14.48 + 23 + 20 + 33 =
15. 15.29 + 57 + 62 + 64 =
16. 16.76 + 46 + 26 + 38 =
17. 17.67 + 60 + 57 + 55 =
18. 18.12 + 54 + 80 + 57 =
19. 19.70 + 37 + 53 + 29 =
20. 20.43 + 42 + 56 + 65 =
21. 21.23 + 78 + 19 + 69 =
22. 22.60 + 62 + 19 + 88 =
23. 23.37 + 24 + 14 + 31 =
24. 24.51 + 74 + 55 + 42 =
25. 25.34 + 70 + 21 + 25 =
26. 26.27 + 36 + 11 + 12 =
27. 27.14 + 43 + 42 + 23 =
28. 28.73 + 23 + 19 + 75 =
29. 29.15 + 53 + 30 + 82 =
30. 30.62 + 30 + 60 + 87 =
31. 31.54 + 30 + 27 + 53 =
32. 32.33 + 23 + 77 + 36 =
33. 33.56 + 17 + 75 + 19 =
34. 34.19 + 56 + 35 + 12 =
35. 35.45 + 69 + 20 + 67 =
36. 36.36 + 15 + 84 + 78 =
37. 37.55 + 21 + 21 + 77 =
38. 38.39 + 42 + 58 + 86 =
39. 39.15 + 75 + 62 + 86 =
40. 40.16 + 82 + 35 + 84 =

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