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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 675 · 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. 1.87 + 88 + 50 + 11 =
  2. 2.50 + 89 + 32 + 28 =
  3. 3.65 + 27 + 23 + 58 =
  4. 4.14 + 21 + 80 + 61 =
  5. 5.85 + 47 + 76 + 22 =
  6. 6.19 + 49 + 61 + 79 =
  7. 7.83 + 28 + 40 + 38 =
  8. 8.14 + 25 + 14 + 69 =
  9. 9.13 + 48 + 22 + 75 =
  10. 10.67 + 35 + 54 + 15 =
  11. 11.13 + 47 + 47 + 32 =
  12. 12.83 + 26 + 11 + 58 =
  13. 13.68 + 33 + 71 + 81 =
  14. 14.81 + 11 + 69 + 71 =
  15. 15.28 + 11 + 34 + 38 =
  16. 16.11 + 21 + 78 + 41 =
  17. 17.11 + 32 + 34 + 79 =
  18. 18.16 + 58 + 89 + 35 =
  19. 19.26 + 33 + 39 + 64 =
  20. 20.69 + 62 + 31 + 75 =
  21. 21.81 + 88 + 43 + 67 =
  22. 22.68 + 67 + 82 + 86 =
  23. 23.20 + 61 + 33 + 22 =
  24. 24.30 + 18 + 84 + 39 =
  25. 25.59 + 18 + 66 + 38 =
  26. 26.12 + 20 + 72 + 17 =
  27. 27.46 + 39 + 51 + 72 =
  28. 28.71 + 24 + 48 + 32 =
  29. 29.79 + 84 + 33 + 12 =
  30. 30.14 + 80 + 29 + 71 =
  31. 31.23 + 67 + 30 + 60 =
  32. 32.58 + 20 + 24 + 31 =
  33. 33.39 + 49 + 85 + 89 =
  34. 34.87 + 21 + 24 + 38 =
  35. 35.79 + 49 + 63 + 61 =
  36. 36.37 + 46 + 25 + 75 =
  37. 37.62 + 37 + 26 + 64 =
  38. 38.68 + 72 + 29 + 28 =
  39. 39.89 + 69 + 42 + 79 =
  40. 40.19 + 17 + 13 + 66 =

Answer key

  1. 236
  2. 199
  3. 173
  4. 176
  5. 230
  6. 208
  7. 189
  8. 122
  9. 158
  10. 171
  11. 139
  12. 178
  13. 253
  14. 232
  15. 111
  16. 151
  17. 156
  18. 198
  19. 162
  20. 237
  21. 279
  22. 303
  23. 136
  24. 171
  25. 181
  26. 121
  27. 208
  28. 175
  29. 208
  30. 194
  31. 180
  32. 133
  33. 262
  34. 170
  35. 252
  36. 183
  37. 189
  38. 197
  39. 279
  40. 115

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