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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 917 · 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. 1.44 + 14 + 62 + 46 =
  2. 2.88 + 36 + 76 + 16 =
  3. 3.87 + 24 + 28 + 65 =
  4. 4.11 + 12 + 71 + 26 =
  5. 5.31 + 39 + 13 + 27 =
  6. 6.85 + 16 + 70 + 62 =
  7. 7.29 + 16 + 73 + 73 =
  8. 8.20 + 42 + 64 + 48 =
  9. 9.21 + 50 + 77 + 24 =
  10. 10.89 + 33 + 28 + 75 =
  11. 11.79 + 37 + 83 + 82 =
  12. 12.63 + 26 + 57 + 44 =
  13. 13.62 + 58 + 76 + 80 =
  14. 14.55 + 12 + 46 + 15 =
  15. 15.15 + 70 + 79 + 48 =
  16. 16.43 + 52 + 32 + 58 =
  17. 17.42 + 44 + 46 + 57 =
  18. 18.53 + 65 + 13 + 39 =
  19. 19.88 + 17 + 80 + 30 =
  20. 20.77 + 71 + 31 + 11 =
  21. 21.54 + 67 + 76 + 23 =
  22. 22.65 + 11 + 12 + 40 =
  23. 23.19 + 23 + 22 + 26 =
  24. 24.27 + 17 + 76 + 36 =
  25. 25.47 + 62 + 60 + 16 =
  26. 26.32 + 52 + 72 + 69 =
  27. 27.11 + 64 + 42 + 47 =
  28. 28.36 + 34 + 84 + 45 =
  29. 29.22 + 84 + 22 + 63 =
  30. 30.88 + 62 + 12 + 71 =
  31. 31.58 + 48 + 88 + 61 =
  32. 32.70 + 74 + 89 + 84 =
  33. 33.15 + 57 + 89 + 53 =
  34. 34.44 + 77 + 74 + 84 =
  35. 35.47 + 80 + 71 + 45 =
  36. 36.67 + 21 + 63 + 46 =
  37. 37.89 + 26 + 75 + 15 =
  38. 38.23 + 37 + 11 + 12 =
  39. 39.53 + 25 + 61 + 69 =
  40. 40.51 + 46 + 12 + 41 =

Answer key

  1. 166
  2. 216
  3. 204
  4. 120
  5. 110
  6. 233
  7. 191
  8. 174
  9. 172
  10. 225
  11. 281
  12. 190
  13. 276
  14. 128
  15. 212
  16. 185
  17. 189
  18. 170
  19. 215
  20. 190
  21. 220
  22. 128
  23. 90
  24. 156
  25. 185
  26. 225
  27. 164
  28. 199
  29. 191
  30. 233
  31. 255
  32. 317
  33. 214
  34. 279
  35. 243
  36. 197
  37. 205
  38. 83
  39. 208
  40. 150

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