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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 921 · 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. 1.48 + 76 + 33 + 46 =
  2. 2.18 + 31 + 59 + 39 =
  3. 3.50 + 25 + 26 + 34 =
  4. 4.17 + 34 + 14 + 21 =
  5. 5.81 + 36 + 23 + 59 =
  6. 6.12 + 29 + 32 + 38 =
  7. 7.78 + 33 + 17 + 19 =
  8. 8.64 + 27 + 21 + 12 =
  9. 9.56 + 27 + 72 + 74 =
  10. 10.67 + 42 + 36 + 38 =
  11. 11.33 + 34 + 30 + 22 =
  12. 12.83 + 76 + 27 + 58 =
  13. 13.42 + 15 + 83 + 37 =
  14. 14.58 + 64 + 67 + 21 =
  15. 15.15 + 37 + 56 + 11 =
  16. 16.25 + 30 + 62 + 18 =
  17. 17.18 + 58 + 71 + 12 =
  18. 18.35 + 25 + 69 + 58 =
  19. 19.22 + 14 + 20 + 47 =
  20. 20.29 + 27 + 51 + 59 =
  21. 21.32 + 57 + 40 + 74 =
  22. 22.74 + 17 + 54 + 86 =
  23. 23.55 + 24 + 21 + 71 =
  24. 24.72 + 68 + 36 + 84 =
  25. 25.42 + 14 + 33 + 27 =
  26. 26.66 + 39 + 78 + 58 =
  27. 27.38 + 29 + 23 + 23 =
  28. 28.81 + 47 + 88 + 54 =
  29. 29.48 + 70 + 64 + 57 =
  30. 30.25 + 59 + 18 + 57 =
  31. 31.30 + 61 + 68 + 44 =
  32. 32.57 + 70 + 26 + 79 =
  33. 33.42 + 87 + 11 + 61 =
  34. 34.49 + 89 + 47 + 62 =
  35. 35.15 + 24 + 38 + 25 =
  36. 36.31 + 70 + 25 + 43 =
  37. 37.36 + 44 + 71 + 56 =
  38. 38.11 + 49 + 88 + 60 =
  39. 39.85 + 69 + 36 + 25 =
  40. 40.68 + 27 + 55 + 35 =

Answer key

  1. 203
  2. 147
  3. 135
  4. 86
  5. 199
  6. 111
  7. 147
  8. 124
  9. 229
  10. 183
  11. 119
  12. 244
  13. 177
  14. 210
  15. 119
  16. 135
  17. 159
  18. 187
  19. 103
  20. 166
  21. 203
  22. 231
  23. 171
  24. 260
  25. 116
  26. 241
  27. 113
  28. 270
  29. 239
  30. 159
  31. 203
  32. 232
  33. 201
  34. 247
  35. 102
  36. 169
  37. 207
  38. 208
  39. 215
  40. 185

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