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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 231 · 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 + 16 + 74 + 81 =
  2. 2.33 + 85 + 53 + 42 =
  3. 3.25 + 80 + 44 + 86 =
  4. 4.66 + 16 + 67 + 85 =
  5. 5.73 + 41 + 51 + 15 =
  6. 6.84 + 53 + 71 + 45 =
  7. 7.46 + 86 + 50 + 47 =
  8. 8.16 + 56 + 88 + 51 =
  9. 9.29 + 21 + 87 + 43 =
  10. 10.76 + 73 + 80 + 34 =
  11. 11.72 + 38 + 64 + 20 =
  12. 12.67 + 66 + 53 + 11 =
  13. 13.15 + 58 + 71 + 34 =
  14. 14.87 + 67 + 66 + 52 =
  15. 15.29 + 28 + 64 + 58 =
  16. 16.89 + 21 + 38 + 25 =
  17. 17.44 + 59 + 12 + 22 =
  18. 18.86 + 19 + 49 + 11 =
  19. 19.29 + 40 + 20 + 69 =
  20. 20.86 + 14 + 83 + 21 =
  21. 21.86 + 28 + 29 + 43 =
  22. 22.41 + 66 + 57 + 61 =
  23. 23.40 + 84 + 43 + 25 =
  24. 24.24 + 24 + 35 + 30 =
  25. 25.86 + 53 + 30 + 89 =
  26. 26.62 + 43 + 59 + 30 =
  27. 27.55 + 25 + 42 + 21 =
  28. 28.89 + 87 + 28 + 83 =
  29. 29.71 + 13 + 51 + 31 =
  30. 30.48 + 22 + 11 + 20 =
  31. 31.41 + 12 + 48 + 66 =
  32. 32.42 + 80 + 72 + 84 =
  33. 33.57 + 11 + 76 + 73 =
  34. 34.57 + 23 + 56 + 32 =
  35. 35.16 + 13 + 18 + 20 =
  36. 36.66 + 69 + 83 + 78 =
  37. 37.18 + 72 + 55 + 54 =
  38. 38.86 + 37 + 15 + 39 =
  39. 39.71 + 34 + 19 + 43 =
  40. 40.22 + 40 + 31 + 47 =

Answer key

  1. 241
  2. 213
  3. 235
  4. 234
  5. 180
  6. 253
  7. 229
  8. 211
  9. 180
  10. 263
  11. 194
  12. 197
  13. 178
  14. 272
  15. 179
  16. 173
  17. 137
  18. 165
  19. 158
  20. 204
  21. 186
  22. 225
  23. 192
  24. 113
  25. 258
  26. 194
  27. 143
  28. 287
  29. 166
  30. 101
  31. 167
  32. 278
  33. 217
  34. 168
  35. 67
  36. 296
  37. 199
  38. 177
  39. 167
  40. 140

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