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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 849 · 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. 1.81 + 16 + 31 + 49 =
  2. 2.79 + 87 + 40 + 70 =
  3. 3.87 + 89 + 14 + 30 =
  4. 4.82 + 66 + 51 + 15 =
  5. 5.12 + 64 + 88 + 58 =
  6. 6.80 + 54 + 81 + 54 =
  7. 7.33 + 75 + 17 + 68 =
  8. 8.31 + 36 + 22 + 38 =
  9. 9.29 + 17 + 55 + 65 =
  10. 10.47 + 11 + 45 + 51 =
  11. 11.46 + 27 + 89 + 79 =
  12. 12.36 + 50 + 22 + 82 =
  13. 13.81 + 32 + 70 + 28 =
  14. 14.63 + 52 + 66 + 23 =
  15. 15.19 + 88 + 24 + 54 =
  16. 16.72 + 22 + 80 + 34 =
  17. 17.25 + 44 + 30 + 54 =
  18. 18.25 + 15 + 55 + 69 =
  19. 19.81 + 72 + 62 + 17 =
  20. 20.89 + 59 + 83 + 56 =
  21. 21.89 + 19 + 45 + 18 =
  22. 22.82 + 26 + 18 + 17 =
  23. 23.30 + 46 + 49 + 20 =
  24. 24.25 + 43 + 51 + 38 =
  25. 25.52 + 19 + 53 + 13 =
  26. 26.63 + 18 + 45 + 38 =
  27. 27.88 + 57 + 29 + 76 =
  28. 28.33 + 43 + 89 + 18 =
  29. 29.17 + 87 + 83 + 55 =
  30. 30.43 + 78 + 45 + 26 =
  31. 31.65 + 78 + 72 + 75 =
  32. 32.78 + 52 + 69 + 23 =
  33. 33.60 + 70 + 11 + 41 =
  34. 34.73 + 13 + 20 + 19 =
  35. 35.20 + 46 + 21 + 35 =
  36. 36.66 + 81 + 21 + 44 =
  37. 37.86 + 17 + 65 + 85 =
  38. 38.42 + 59 + 29 + 34 =
  39. 39.77 + 89 + 34 + 22 =
  40. 40.73 + 29 + 41 + 75 =

Answer key

  1. 177
  2. 276
  3. 220
  4. 214
  5. 222
  6. 269
  7. 193
  8. 127
  9. 166
  10. 154
  11. 241
  12. 190
  13. 211
  14. 204
  15. 185
  16. 208
  17. 153
  18. 164
  19. 232
  20. 287
  21. 171
  22. 143
  23. 145
  24. 157
  25. 137
  26. 164
  27. 250
  28. 183
  29. 242
  30. 192
  31. 290
  32. 222
  33. 182
  34. 125
  35. 122
  36. 212
  37. 253
  38. 164
  39. 222
  40. 218

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