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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 890 · 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. 1.20 + 24 + 59 + 36 =
  2. 2.67 + 79 + 34 + 45 =
  3. 3.87 + 36 + 60 + 15 =
  4. 4.49 + 50 + 69 + 39 =
  5. 5.45 + 83 + 33 + 56 =
  6. 6.85 + 21 + 44 + 13 =
  7. 7.63 + 81 + 14 + 60 =
  8. 8.77 + 33 + 43 + 51 =
  9. 9.68 + 83 + 60 + 83 =
  10. 10.17 + 21 + 82 + 47 =
  11. 11.53 + 30 + 75 + 11 =
  12. 12.13 + 11 + 27 + 43 =
  13. 13.20 + 88 + 14 + 87 =
  14. 14.23 + 80 + 26 + 30 =
  15. 15.69 + 15 + 55 + 19 =
  16. 16.39 + 30 + 83 + 61 =
  17. 17.76 + 15 + 68 + 83 =
  18. 18.70 + 32 + 70 + 43 =
  19. 19.42 + 59 + 80 + 69 =
  20. 20.66 + 37 + 48 + 25 =
  21. 21.61 + 35 + 51 + 70 =
  22. 22.61 + 11 + 49 + 32 =
  23. 23.31 + 62 + 18 + 21 =
  24. 24.78 + 45 + 88 + 86 =
  25. 25.55 + 37 + 34 + 20 =
  26. 26.20 + 36 + 19 + 30 =
  27. 27.51 + 15 + 40 + 64 =
  28. 28.86 + 12 + 53 + 34 =
  29. 29.12 + 75 + 89 + 33 =
  30. 30.60 + 57 + 18 + 25 =
  31. 31.60 + 12 + 86 + 23 =
  32. 32.24 + 80 + 53 + 74 =
  33. 33.11 + 46 + 56 + 75 =
  34. 34.22 + 18 + 67 + 77 =
  35. 35.19 + 14 + 79 + 66 =
  36. 36.67 + 67 + 55 + 39 =
  37. 37.56 + 64 + 66 + 15 =
  38. 38.57 + 89 + 69 + 23 =
  39. 39.84 + 46 + 66 + 14 =
  40. 40.88 + 86 + 82 + 74 =

Answer key

  1. 139
  2. 225
  3. 198
  4. 207
  5. 217
  6. 163
  7. 218
  8. 204
  9. 294
  10. 167
  11. 169
  12. 94
  13. 209
  14. 159
  15. 158
  16. 213
  17. 242
  18. 215
  19. 250
  20. 176
  21. 217
  22. 153
  23. 132
  24. 297
  25. 146
  26. 105
  27. 170
  28. 185
  29. 209
  30. 160
  31. 181
  32. 231
  33. 188
  34. 184
  35. 178
  36. 228
  37. 201
  38. 238
  39. 210
  40. 330

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