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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 720 · 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. 1.73 + 77 + 49 + 45 =
  2. 2.33 + 18 + 30 + 23 =
  3. 3.33 + 83 + 84 + 79 =
  4. 4.41 + 36 + 59 + 81 =
  5. 5.52 + 61 + 49 + 26 =
  6. 6.30 + 54 + 28 + 81 =
  7. 7.58 + 72 + 78 + 26 =
  8. 8.57 + 46 + 21 + 57 =
  9. 9.18 + 31 + 39 + 33 =
  10. 10.37 + 44 + 49 + 81 =
  11. 11.79 + 58 + 13 + 15 =
  12. 12.16 + 36 + 80 + 18 =
  13. 13.83 + 84 + 12 + 81 =
  14. 14.61 + 16 + 19 + 87 =
  15. 15.24 + 41 + 80 + 39 =
  16. 16.79 + 19 + 26 + 30 =
  17. 17.45 + 60 + 81 + 44 =
  18. 18.40 + 39 + 66 + 37 =
  19. 19.68 + 16 + 48 + 72 =
  20. 20.64 + 71 + 11 + 33 =
  21. 21.48 + 41 + 30 + 29 =
  22. 22.17 + 88 + 44 + 65 =
  23. 23.36 + 75 + 25 + 89 =
  24. 24.73 + 77 + 68 + 24 =
  25. 25.26 + 43 + 45 + 67 =
  26. 26.46 + 72 + 23 + 88 =
  27. 27.20 + 30 + 11 + 18 =
  28. 28.43 + 57 + 76 + 72 =
  29. 29.54 + 24 + 48 + 38 =
  30. 30.32 + 89 + 65 + 48 =
  31. 31.29 + 22 + 81 + 76 =
  32. 32.25 + 41 + 79 + 20 =
  33. 33.79 + 46 + 17 + 18 =
  34. 34.53 + 87 + 33 + 33 =
  35. 35.36 + 68 + 88 + 85 =
  36. 36.24 + 73 + 52 + 32 =
  37. 37.38 + 88 + 47 + 56 =
  38. 38.11 + 16 + 60 + 80 =
  39. 39.82 + 43 + 46 + 35 =
  40. 40.18 + 69 + 16 + 84 =

Answer key

  1. 244
  2. 104
  3. 279
  4. 217
  5. 188
  6. 193
  7. 234
  8. 181
  9. 121
  10. 211
  11. 165
  12. 150
  13. 260
  14. 183
  15. 184
  16. 154
  17. 230
  18. 182
  19. 204
  20. 179
  21. 148
  22. 214
  23. 225
  24. 242
  25. 181
  26. 229
  27. 79
  28. 248
  29. 164
  30. 234
  31. 208
  32. 165
  33. 160
  34. 206
  35. 277
  36. 181
  37. 229
  38. 167
  39. 206
  40. 187

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