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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 808 · 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. 1.31 + 58 + 39 + 12 =
  2. 2.23 + 69 + 64 + 44 =
  3. 3.89 + 31 + 26 + 44 =
  4. 4.62 + 33 + 47 + 14 =
  5. 5.88 + 41 + 51 + 80 =
  6. 6.13 + 12 + 37 + 62 =
  7. 7.23 + 58 + 14 + 14 =
  8. 8.65 + 85 + 66 + 35 =
  9. 9.11 + 39 + 25 + 78 =
  10. 10.27 + 25 + 24 + 29 =
  11. 11.31 + 41 + 11 + 84 =
  12. 12.81 + 34 + 70 + 73 =
  13. 13.25 + 16 + 65 + 20 =
  14. 14.56 + 29 + 73 + 74 =
  15. 15.74 + 13 + 52 + 86 =
  16. 16.46 + 28 + 66 + 89 =
  17. 17.83 + 45 + 53 + 76 =
  18. 18.47 + 53 + 53 + 24 =
  19. 19.82 + 89 + 76 + 55 =
  20. 20.19 + 62 + 41 + 32 =
  21. 21.86 + 27 + 61 + 81 =
  22. 22.74 + 16 + 37 + 72 =
  23. 23.19 + 24 + 78 + 58 =
  24. 24.53 + 23 + 17 + 49 =
  25. 25.40 + 21 + 72 + 36 =
  26. 26.46 + 49 + 67 + 68 =
  27. 27.66 + 31 + 73 + 74 =
  28. 28.78 + 82 + 61 + 30 =
  29. 29.17 + 35 + 74 + 36 =
  30. 30.27 + 84 + 78 + 81 =
  31. 31.31 + 70 + 35 + 81 =
  32. 32.74 + 20 + 50 + 32 =
  33. 33.61 + 50 + 12 + 36 =
  34. 34.73 + 85 + 70 + 35 =
  35. 35.60 + 11 + 41 + 72 =
  36. 36.17 + 29 + 67 + 26 =
  37. 37.21 + 87 + 14 + 40 =
  38. 38.70 + 73 + 33 + 74 =
  39. 39.71 + 38 + 22 + 53 =
  40. 40.78 + 65 + 85 + 18 =

Answer key

  1. 140
  2. 200
  3. 190
  4. 156
  5. 260
  6. 124
  7. 109
  8. 251
  9. 153
  10. 105
  11. 167
  12. 258
  13. 126
  14. 232
  15. 225
  16. 229
  17. 257
  18. 177
  19. 302
  20. 154
  21. 255
  22. 199
  23. 179
  24. 142
  25. 169
  26. 230
  27. 244
  28. 251
  29. 162
  30. 270
  31. 217
  32. 176
  33. 159
  34. 263
  35. 184
  36. 139
  37. 162
  38. 250
  39. 184
  40. 246

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