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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 704 · 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. 1.71 + 66 + 27 + 21 =
  2. 2.42 + 87 + 13 + 47 =
  3. 3.30 + 52 + 22 + 35 =
  4. 4.65 + 67 + 74 + 11 =
  5. 5.82 + 88 + 78 + 39 =
  6. 6.15 + 18 + 32 + 30 =
  7. 7.66 + 61 + 82 + 11 =
  8. 8.71 + 64 + 57 + 71 =
  9. 9.82 + 30 + 30 + 14 =
  10. 10.60 + 12 + 80 + 14 =
  11. 11.15 + 31 + 24 + 76 =
  12. 12.78 + 30 + 16 + 37 =
  13. 13.58 + 14 + 11 + 78 =
  14. 14.52 + 85 + 80 + 42 =
  15. 15.60 + 29 + 17 + 53 =
  16. 16.34 + 28 + 86 + 30 =
  17. 17.67 + 18 + 44 + 61 =
  18. 18.68 + 68 + 33 + 86 =
  19. 19.43 + 27 + 81 + 64 =
  20. 20.72 + 82 + 63 + 32 =
  21. 21.31 + 79 + 85 + 60 =
  22. 22.81 + 60 + 21 + 60 =
  23. 23.87 + 74 + 85 + 55 =
  24. 24.88 + 66 + 49 + 32 =
  25. 25.28 + 87 + 14 + 61 =
  26. 26.62 + 42 + 19 + 21 =
  27. 27.32 + 22 + 41 + 67 =
  28. 28.25 + 74 + 88 + 28 =
  29. 29.50 + 68 + 58 + 30 =
  30. 30.14 + 21 + 44 + 76 =
  31. 31.47 + 30 + 35 + 30 =
  32. 32.67 + 35 + 26 + 11 =
  33. 33.23 + 54 + 18 + 41 =
  34. 34.79 + 55 + 66 + 38 =
  35. 35.39 + 58 + 40 + 88 =
  36. 36.37 + 27 + 78 + 50 =
  37. 37.50 + 40 + 83 + 20 =
  38. 38.26 + 69 + 61 + 55 =
  39. 39.84 + 13 + 36 + 72 =
  40. 40.14 + 64 + 38 + 73 =

Answer key

  1. 185
  2. 189
  3. 139
  4. 217
  5. 287
  6. 95
  7. 220
  8. 263
  9. 156
  10. 166
  11. 146
  12. 161
  13. 161
  14. 259
  15. 159
  16. 178
  17. 190
  18. 255
  19. 215
  20. 249
  21. 255
  22. 222
  23. 301
  24. 235
  25. 190
  26. 144
  27. 162
  28. 215
  29. 206
  30. 155
  31. 142
  32. 139
  33. 136
  34. 238
  35. 225
  36. 192
  37. 193
  38. 211
  39. 205
  40. 189

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