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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 154 · 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. 1.85 + 81 + 13 + 56 =
  2. 2.48 + 56 + 31 + 83 =
  3. 3.30 + 31 + 56 + 65 =
  4. 4.14 + 39 + 89 + 45 =
  5. 5.58 + 40 + 53 + 28 =
  6. 6.16 + 44 + 71 + 13 =
  7. 7.36 + 67 + 79 + 43 =
  8. 8.89 + 11 + 46 + 66 =
  9. 9.37 + 87 + 88 + 18 =
  10. 10.34 + 84 + 72 + 84 =
  11. 11.12 + 28 + 49 + 24 =
  12. 12.57 + 84 + 60 + 25 =
  13. 13.65 + 18 + 20 + 44 =
  14. 14.87 + 33 + 37 + 23 =
  15. 15.23 + 19 + 87 + 38 =
  16. 16.69 + 29 + 49 + 33 =
  17. 17.85 + 15 + 67 + 18 =
  18. 18.61 + 24 + 69 + 85 =
  19. 19.32 + 71 + 82 + 80 =
  20. 20.31 + 68 + 63 + 11 =
  21. 21.22 + 87 + 62 + 24 =
  22. 22.78 + 60 + 74 + 30 =
  23. 23.36 + 76 + 28 + 79 =
  24. 24.16 + 13 + 84 + 75 =
  25. 25.89 + 15 + 55 + 63 =
  26. 26.58 + 47 + 38 + 21 =
  27. 27.15 + 88 + 43 + 21 =
  28. 28.39 + 68 + 81 + 27 =
  29. 29.67 + 28 + 18 + 68 =
  30. 30.89 + 29 + 60 + 61 =
  31. 31.46 + 34 + 22 + 29 =
  32. 32.54 + 12 + 15 + 17 =
  33. 33.77 + 70 + 69 + 57 =
  34. 34.57 + 73 + 36 + 31 =
  35. 35.39 + 76 + 58 + 18 =
  36. 36.50 + 11 + 33 + 50 =
  37. 37.32 + 65 + 11 + 18 =
  38. 38.47 + 28 + 11 + 51 =
  39. 39.12 + 72 + 26 + 34 =
  40. 40.23 + 52 + 34 + 23 =

Answer key

  1. 235
  2. 218
  3. 182
  4. 187
  5. 179
  6. 144
  7. 225
  8. 212
  9. 230
  10. 274
  11. 113
  12. 226
  13. 147
  14. 180
  15. 167
  16. 180
  17. 185
  18. 239
  19. 265
  20. 173
  21. 195
  22. 242
  23. 219
  24. 188
  25. 222
  26. 164
  27. 167
  28. 215
  29. 181
  30. 239
  31. 131
  32. 98
  33. 273
  34. 197
  35. 191
  36. 144
  37. 126
  38. 137
  39. 144
  40. 132

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