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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 765 · 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. 1.50 + 68 + 15 + 44 =
  2. 2.31 + 62 + 21 + 88 =
  3. 3.78 + 44 + 74 + 60 =
  4. 4.45 + 80 + 60 + 83 =
  5. 5.35 + 76 + 49 + 24 =
  6. 6.27 + 74 + 26 + 46 =
  7. 7.19 + 42 + 35 + 16 =
  8. 8.65 + 11 + 75 + 28 =
  9. 9.21 + 22 + 83 + 17 =
  10. 10.11 + 11 + 53 + 84 =
  11. 11.21 + 55 + 89 + 68 =
  12. 12.59 + 18 + 31 + 47 =
  13. 13.24 + 41 + 88 + 72 =
  14. 14.21 + 30 + 87 + 17 =
  15. 15.52 + 48 + 32 + 82 =
  16. 16.12 + 41 + 21 + 31 =
  17. 17.44 + 52 + 43 + 81 =
  18. 18.72 + 89 + 53 + 30 =
  19. 19.39 + 66 + 70 + 30 =
  20. 20.27 + 68 + 17 + 62 =
  21. 21.72 + 25 + 69 + 40 =
  22. 22.59 + 27 + 54 + 38 =
  23. 23.82 + 33 + 26 + 34 =
  24. 24.27 + 77 + 47 + 28 =
  25. 25.57 + 49 + 43 + 38 =
  26. 26.11 + 62 + 43 + 44 =
  27. 27.63 + 29 + 22 + 23 =
  28. 28.88 + 64 + 12 + 67 =
  29. 29.61 + 70 + 38 + 31 =
  30. 30.64 + 61 + 33 + 17 =
  31. 31.64 + 67 + 28 + 23 =
  32. 32.26 + 49 + 18 + 47 =
  33. 33.47 + 42 + 79 + 85 =
  34. 34.50 + 74 + 31 + 31 =
  35. 35.78 + 40 + 17 + 35 =
  36. 36.15 + 20 + 25 + 23 =
  37. 37.46 + 49 + 27 + 24 =
  38. 38.62 + 77 + 16 + 54 =
  39. 39.49 + 47 + 70 + 75 =
  40. 40.27 + 72 + 23 + 25 =

Answer key

  1. 177
  2. 202
  3. 256
  4. 268
  5. 184
  6. 173
  7. 112
  8. 179
  9. 143
  10. 159
  11. 233
  12. 155
  13. 225
  14. 155
  15. 214
  16. 105
  17. 220
  18. 244
  19. 205
  20. 174
  21. 206
  22. 178
  23. 175
  24. 179
  25. 187
  26. 160
  27. 137
  28. 231
  29. 200
  30. 175
  31. 182
  32. 140
  33. 253
  34. 186
  35. 170
  36. 83
  37. 146
  38. 209
  39. 241
  40. 147

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