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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 584 · 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. 1.59 + 21 + 19 + 78 =
  2. 2.77 + 17 + 29 + 56 =
  3. 3.70 + 58 + 20 + 77 =
  4. 4.84 + 37 + 60 + 55 =
  5. 5.50 + 67 + 27 + 86 =
  6. 6.33 + 27 + 45 + 33 =
  7. 7.58 + 46 + 24 + 68 =
  8. 8.29 + 66 + 62 + 85 =
  9. 9.32 + 53 + 52 + 24 =
  10. 10.85 + 53 + 77 + 52 =
  11. 11.87 + 21 + 78 + 85 =
  12. 12.42 + 61 + 17 + 36 =
  13. 13.84 + 27 + 11 + 31 =
  14. 14.40 + 14 + 49 + 33 =
  15. 15.27 + 12 + 58 + 13 =
  16. 16.57 + 30 + 64 + 83 =
  17. 17.34 + 89 + 27 + 30 =
  18. 18.85 + 23 + 26 + 72 =
  19. 19.59 + 61 + 78 + 87 =
  20. 20.56 + 87 + 71 + 59 =
  21. 21.76 + 20 + 80 + 76 =
  22. 22.42 + 55 + 54 + 47 =
  23. 23.63 + 54 + 12 + 76 =
  24. 24.32 + 78 + 86 + 47 =
  25. 25.64 + 73 + 30 + 41 =
  26. 26.50 + 19 + 30 + 78 =
  27. 27.57 + 89 + 15 + 45 =
  28. 28.76 + 59 + 16 + 51 =
  29. 29.72 + 41 + 45 + 25 =
  30. 30.24 + 36 + 80 + 70 =
  31. 31.89 + 24 + 13 + 20 =
  32. 32.39 + 47 + 27 + 12 =
  33. 33.18 + 75 + 76 + 68 =
  34. 34.34 + 50 + 60 + 54 =
  35. 35.16 + 13 + 76 + 56 =
  36. 36.15 + 86 + 30 + 59 =
  37. 37.45 + 50 + 15 + 21 =
  38. 38.55 + 24 + 82 + 40 =
  39. 39.83 + 13 + 19 + 38 =
  40. 40.81 + 49 + 15 + 29 =

Answer key

  1. 177
  2. 179
  3. 225
  4. 236
  5. 230
  6. 138
  7. 196
  8. 242
  9. 161
  10. 267
  11. 271
  12. 156
  13. 153
  14. 136
  15. 110
  16. 234
  17. 180
  18. 206
  19. 285
  20. 273
  21. 252
  22. 198
  23. 205
  24. 243
  25. 208
  26. 177
  27. 206
  28. 202
  29. 183
  30. 210
  31. 146
  32. 125
  33. 237
  34. 198
  35. 161
  36. 190
  37. 131
  38. 201
  39. 153
  40. 174

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