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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 647 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.85 + 33 + 49 + 17 =
  2. 2.24 + 17 + 44 + 65 =
  3. 3.25 + 55 + 26 + 46 =
  4. 4.28 + 15 + 50 + 35 =
  5. 5.23 + 54 + 41 + 19 =
  6. 6.52 + 86 + 33 + 33 =
  7. 7.40 + 26 + 43 + 59 =
  8. 8.66 + 83 + 69 + 48 =
  9. 9.58 + 46 + 47 + 17 =
  10. 10.57 + 17 + 46 + 34 =
  11. 11.74 + 16 + 43 + 58 =
  12. 12.89 + 78 + 35 + 83 =
  13. 13.49 + 27 + 67 + 37 =
  14. 14.23 + 59 + 61 + 67 =
  15. 15.55 + 22 + 30 + 24 =
  16. 16.70 + 12 + 46 + 14 =
  17. 17.62 + 47 + 88 + 69 =
  18. 18.88 + 89 + 41 + 85 =
  19. 19.40 + 17 + 86 + 71 =
  20. 20.71 + 37 + 47 + 85 =
  21. 21.70 + 36 + 84 + 64 =
  22. 22.33 + 20 + 17 + 72 =
  23. 23.59 + 34 + 41 + 11 =
  24. 24.85 + 17 + 26 + 57 =
  25. 25.13 + 35 + 12 + 27 =
  26. 26.16 + 51 + 48 + 20 =
  27. 27.64 + 57 + 78 + 12 =
  28. 28.14 + 26 + 59 + 16 =
  29. 29.63 + 18 + 18 + 15 =
  30. 30.70 + 28 + 49 + 41 =
  31. 31.23 + 31 + 87 + 26 =
  32. 32.15 + 67 + 56 + 27 =
  33. 33.28 + 46 + 13 + 70 =
  34. 34.17 + 85 + 24 + 84 =
  35. 35.17 + 41 + 35 + 49 =
  36. 36.22 + 87 + 79 + 54 =
  37. 37.21 + 59 + 78 + 82 =
  38. 38.22 + 83 + 56 + 73 =
  39. 39.64 + 61 + 40 + 29 =
  40. 40.38 + 78 + 82 + 39 =

Answer key

  1. 184
  2. 150
  3. 152
  4. 128
  5. 137
  6. 204
  7. 168
  8. 266
  9. 168
  10. 154
  11. 191
  12. 285
  13. 180
  14. 210
  15. 131
  16. 142
  17. 266
  18. 303
  19. 214
  20. 240
  21. 254
  22. 142
  23. 145
  24. 185
  25. 87
  26. 135
  27. 211
  28. 115
  29. 114
  30. 188
  31. 167
  32. 165
  33. 157
  34. 210
  35. 142
  36. 242
  37. 240
  38. 234
  39. 194
  40. 237

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