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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 627 · 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. 1.61 + 55 + 58 + 75 =
  2. 2.55 + 36 + 19 + 67 =
  3. 3.68 + 70 + 17 + 89 =
  4. 4.13 + 12 + 51 + 73 =
  5. 5.19 + 62 + 38 + 50 =
  6. 6.63 + 15 + 24 + 29 =
  7. 7.72 + 15 + 18 + 61 =
  8. 8.88 + 55 + 61 + 21 =
  9. 9.27 + 28 + 28 + 28 =
  10. 10.41 + 46 + 14 + 53 =
  11. 11.82 + 53 + 61 + 41 =
  12. 12.83 + 42 + 56 + 22 =
  13. 13.23 + 81 + 54 + 14 =
  14. 14.17 + 30 + 39 + 26 =
  15. 15.37 + 28 + 59 + 67 =
  16. 16.60 + 40 + 38 + 69 =
  17. 17.68 + 70 + 18 + 55 =
  18. 18.85 + 45 + 48 + 46 =
  19. 19.71 + 22 + 68 + 58 =
  20. 20.20 + 40 + 19 + 19 =
  21. 21.33 + 39 + 13 + 82 =
  22. 22.50 + 66 + 82 + 26 =
  23. 23.68 + 32 + 71 + 42 =
  24. 24.19 + 52 + 74 + 71 =
  25. 25.67 + 63 + 88 + 76 =
  26. 26.89 + 29 + 85 + 17 =
  27. 27.14 + 81 + 45 + 42 =
  28. 28.40 + 39 + 88 + 60 =
  29. 29.29 + 12 + 29 + 43 =
  30. 30.72 + 49 + 83 + 33 =
  31. 31.63 + 73 + 23 + 49 =
  32. 32.34 + 52 + 24 + 24 =
  33. 33.81 + 31 + 32 + 63 =
  34. 34.78 + 13 + 26 + 75 =
  35. 35.32 + 33 + 33 + 78 =
  36. 36.19 + 52 + 58 + 25 =
  37. 37.44 + 78 + 34 + 82 =
  38. 38.27 + 23 + 31 + 83 =
  39. 39.17 + 74 + 88 + 37 =
  40. 40.22 + 25 + 11 + 37 =

Answer key

  1. 249
  2. 177
  3. 244
  4. 149
  5. 169
  6. 131
  7. 166
  8. 225
  9. 111
  10. 154
  11. 237
  12. 203
  13. 172
  14. 112
  15. 191
  16. 207
  17. 211
  18. 224
  19. 219
  20. 98
  21. 167
  22. 224
  23. 213
  24. 216
  25. 294
  26. 220
  27. 182
  28. 227
  29. 113
  30. 237
  31. 208
  32. 134
  33. 207
  34. 192
  35. 176
  36. 154
  37. 238
  38. 164
  39. 216
  40. 95

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