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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 750 · 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. 1.46 + 21 + 87 + 55 =
  2. 2.34 + 37 + 50 + 21 =
  3. 3.15 + 87 + 67 + 85 =
  4. 4.74 + 31 + 47 + 23 =
  5. 5.50 + 41 + 17 + 44 =
  6. 6.23 + 14 + 77 + 23 =
  7. 7.33 + 39 + 64 + 59 =
  8. 8.31 + 79 + 70 + 51 =
  9. 9.22 + 25 + 88 + 40 =
  10. 10.16 + 22 + 59 + 56 =
  11. 11.11 + 19 + 43 + 34 =
  12. 12.31 + 72 + 31 + 59 =
  13. 13.82 + 83 + 37 + 37 =
  14. 14.78 + 59 + 55 + 89 =
  15. 15.37 + 88 + 16 + 59 =
  16. 16.13 + 14 + 25 + 75 =
  17. 17.23 + 11 + 69 + 20 =
  18. 18.63 + 17 + 61 + 58 =
  19. 19.88 + 24 + 21 + 31 =
  20. 20.88 + 11 + 21 + 70 =
  21. 21.44 + 89 + 67 + 66 =
  22. 22.23 + 46 + 87 + 58 =
  23. 23.66 + 51 + 58 + 72 =
  24. 24.72 + 24 + 82 + 86 =
  25. 25.71 + 80 + 64 + 85 =
  26. 26.86 + 52 + 80 + 14 =
  27. 27.35 + 89 + 75 + 23 =
  28. 28.82 + 22 + 71 + 12 =
  29. 29.16 + 28 + 84 + 81 =
  30. 30.73 + 70 + 72 + 44 =
  31. 31.58 + 14 + 29 + 89 =
  32. 32.39 + 77 + 41 + 59 =
  33. 33.60 + 21 + 16 + 54 =
  34. 34.15 + 49 + 64 + 43 =
  35. 35.29 + 79 + 75 + 19 =
  36. 36.17 + 74 + 14 + 74 =
  37. 37.79 + 85 + 60 + 88 =
  38. 38.19 + 68 + 22 + 64 =
  39. 39.50 + 78 + 88 + 44 =
  40. 40.74 + 17 + 55 + 14 =

Answer key

  1. 209
  2. 142
  3. 254
  4. 175
  5. 152
  6. 137
  7. 195
  8. 231
  9. 175
  10. 153
  11. 107
  12. 193
  13. 239
  14. 281
  15. 200
  16. 127
  17. 123
  18. 199
  19. 164
  20. 190
  21. 266
  22. 214
  23. 247
  24. 264
  25. 300
  26. 232
  27. 222
  28. 187
  29. 209
  30. 259
  31. 190
  32. 216
  33. 151
  34. 171
  35. 202
  36. 179
  37. 312
  38. 173
  39. 260
  40. 160

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