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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 752 · 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. 1.50 + 12 + 11 + 38 =
  2. 2.67 + 59 + 83 + 61 =
  3. 3.31 + 19 + 33 + 41 =
  4. 4.89 + 47 + 34 + 31 =
  5. 5.86 + 65 + 50 + 73 =
  6. 6.42 + 59 + 12 + 30 =
  7. 7.79 + 49 + 32 + 45 =
  8. 8.58 + 81 + 60 + 38 =
  9. 9.15 + 44 + 53 + 69 =
  10. 10.79 + 62 + 54 + 84 =
  11. 11.29 + 62 + 75 + 53 =
  12. 12.82 + 25 + 11 + 77 =
  13. 13.42 + 81 + 16 + 47 =
  14. 14.50 + 45 + 85 + 19 =
  15. 15.81 + 17 + 51 + 18 =
  16. 16.63 + 16 + 34 + 84 =
  17. 17.48 + 80 + 63 + 56 =
  18. 18.19 + 50 + 42 + 76 =
  19. 19.11 + 12 + 38 + 15 =
  20. 20.34 + 36 + 64 + 77 =
  21. 21.69 + 47 + 33 + 66 =
  22. 22.68 + 47 + 38 + 64 =
  23. 23.50 + 38 + 46 + 24 =
  24. 24.32 + 68 + 61 + 43 =
  25. 25.14 + 26 + 75 + 31 =
  26. 26.35 + 57 + 23 + 70 =
  27. 27.64 + 13 + 47 + 30 =
  28. 28.53 + 86 + 81 + 78 =
  29. 29.24 + 44 + 79 + 87 =
  30. 30.41 + 25 + 40 + 20 =
  31. 31.86 + 42 + 54 + 29 =
  32. 32.31 + 81 + 74 + 27 =
  33. 33.81 + 32 + 52 + 14 =
  34. 34.70 + 43 + 84 + 52 =
  35. 35.46 + 17 + 58 + 52 =
  36. 36.41 + 46 + 11 + 57 =
  37. 37.76 + 47 + 17 + 54 =
  38. 38.61 + 36 + 30 + 24 =
  39. 39.44 + 29 + 49 + 34 =
  40. 40.60 + 36 + 38 + 64 =

Answer key

  1. 111
  2. 270
  3. 124
  4. 201
  5. 274
  6. 143
  7. 205
  8. 237
  9. 181
  10. 279
  11. 219
  12. 195
  13. 186
  14. 199
  15. 167
  16. 197
  17. 247
  18. 187
  19. 76
  20. 211
  21. 215
  22. 217
  23. 158
  24. 204
  25. 146
  26. 185
  27. 154
  28. 298
  29. 234
  30. 126
  31. 211
  32. 213
  33. 179
  34. 249
  35. 173
  36. 155
  37. 194
  38. 151
  39. 156
  40. 198

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