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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 482 · 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. 1.70 + 82 + 25 + 63 =
  2. 2.84 + 68 + 62 + 23 =
  3. 3.70 + 48 + 64 + 81 =
  4. 4.87 + 26 + 74 + 29 =
  5. 5.39 + 43 + 25 + 28 =
  6. 6.71 + 85 + 49 + 80 =
  7. 7.17 + 21 + 12 + 38 =
  8. 8.53 + 24 + 14 + 85 =
  9. 9.25 + 65 + 15 + 21 =
  10. 10.64 + 48 + 15 + 13 =
  11. 11.83 + 81 + 15 + 73 =
  12. 12.89 + 12 + 53 + 19 =
  13. 13.52 + 33 + 13 + 89 =
  14. 14.59 + 56 + 12 + 15 =
  15. 15.34 + 58 + 42 + 51 =
  16. 16.50 + 59 + 46 + 23 =
  17. 17.42 + 49 + 82 + 44 =
  18. 18.35 + 78 + 43 + 42 =
  19. 19.72 + 38 + 47 + 33 =
  20. 20.26 + 68 + 12 + 30 =
  21. 21.79 + 52 + 21 + 50 =
  22. 22.59 + 77 + 24 + 11 =
  23. 23.83 + 27 + 22 + 68 =
  24. 24.18 + 44 + 52 + 33 =
  25. 25.61 + 32 + 79 + 11 =
  26. 26.84 + 72 + 24 + 57 =
  27. 27.69 + 57 + 22 + 54 =
  28. 28.45 + 65 + 24 + 28 =
  29. 29.62 + 82 + 36 + 33 =
  30. 30.80 + 27 + 34 + 27 =
  31. 31.23 + 82 + 40 + 40 =
  32. 32.75 + 76 + 72 + 24 =
  33. 33.42 + 54 + 60 + 26 =
  34. 34.59 + 55 + 17 + 48 =
  35. 35.16 + 75 + 11 + 55 =
  36. 36.59 + 59 + 26 + 74 =
  37. 37.80 + 27 + 45 + 74 =
  38. 38.62 + 49 + 50 + 32 =
  39. 39.14 + 43 + 20 + 13 =
  40. 40.85 + 86 + 84 + 17 =

Answer key

  1. 240
  2. 237
  3. 263
  4. 216
  5. 135
  6. 285
  7. 88
  8. 176
  9. 126
  10. 140
  11. 252
  12. 173
  13. 187
  14. 142
  15. 185
  16. 178
  17. 217
  18. 198
  19. 190
  20. 136
  21. 202
  22. 171
  23. 200
  24. 147
  25. 183
  26. 237
  27. 202
  28. 162
  29. 213
  30. 168
  31. 185
  32. 247
  33. 182
  34. 179
  35. 157
  36. 218
  37. 226
  38. 193
  39. 90
  40. 272

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