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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 671 · 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. 1.87 + 23 + 89 + 45 =
  2. 2.11 + 45 + 30 + 64 =
  3. 3.29 + 75 + 48 + 73 =
  4. 4.75 + 58 + 81 + 51 =
  5. 5.18 + 76 + 76 + 26 =
  6. 6.33 + 60 + 29 + 40 =
  7. 7.48 + 11 + 14 + 20 =
  8. 8.76 + 52 + 52 + 53 =
  9. 9.15 + 79 + 29 + 14 =
  10. 10.13 + 39 + 12 + 62 =
  11. 11.82 + 18 + 30 + 25 =
  12. 12.34 + 74 + 24 + 27 =
  13. 13.17 + 68 + 17 + 39 =
  14. 14.84 + 76 + 76 + 23 =
  15. 15.53 + 40 + 79 + 47 =
  16. 16.22 + 34 + 66 + 22 =
  17. 17.13 + 72 + 67 + 41 =
  18. 18.78 + 19 + 13 + 12 =
  19. 19.31 + 18 + 75 + 43 =
  20. 20.13 + 34 + 60 + 33 =
  21. 21.20 + 31 + 15 + 15 =
  22. 22.85 + 26 + 55 + 72 =
  23. 23.22 + 21 + 35 + 46 =
  24. 24.55 + 79 + 18 + 20 =
  25. 25.24 + 57 + 49 + 43 =
  26. 26.59 + 23 + 80 + 57 =
  27. 27.43 + 40 + 61 + 22 =
  28. 28.34 + 37 + 52 + 28 =
  29. 29.73 + 17 + 50 + 69 =
  30. 30.16 + 46 + 38 + 71 =
  31. 31.34 + 59 + 43 + 23 =
  32. 32.64 + 57 + 54 + 52 =
  33. 33.36 + 36 + 67 + 55 =
  34. 34.42 + 42 + 30 + 40 =
  35. 35.32 + 19 + 62 + 18 =
  36. 36.34 + 84 + 72 + 58 =
  37. 37.89 + 66 + 51 + 31 =
  38. 38.59 + 50 + 34 + 78 =
  39. 39.85 + 77 + 22 + 87 =
  40. 40.81 + 87 + 14 + 49 =

Answer key

  1. 244
  2. 150
  3. 225
  4. 265
  5. 196
  6. 162
  7. 93
  8. 233
  9. 137
  10. 126
  11. 155
  12. 159
  13. 141
  14. 259
  15. 219
  16. 144
  17. 193
  18. 122
  19. 167
  20. 140
  21. 81
  22. 238
  23. 124
  24. 172
  25. 173
  26. 219
  27. 166
  28. 151
  29. 209
  30. 171
  31. 159
  32. 227
  33. 194
  34. 154
  35. 131
  36. 248
  37. 237
  38. 221
  39. 271
  40. 231

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