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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 311 · 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. 1.74 + 62 + 48 + 59 =
  2. 2.45 + 33 + 88 + 78 =
  3. 3.70 + 31 + 59 + 22 =
  4. 4.66 + 16 + 49 + 20 =
  5. 5.68 + 75 + 46 + 84 =
  6. 6.85 + 35 + 57 + 41 =
  7. 7.48 + 76 + 62 + 26 =
  8. 8.31 + 37 + 36 + 33 =
  9. 9.39 + 88 + 15 + 82 =
  10. 10.60 + 72 + 61 + 67 =
  11. 11.25 + 28 + 40 + 82 =
  12. 12.84 + 89 + 41 + 21 =
  13. 13.23 + 35 + 65 + 25 =
  14. 14.28 + 65 + 35 + 27 =
  15. 15.32 + 62 + 59 + 43 =
  16. 16.73 + 33 + 38 + 27 =
  17. 17.77 + 12 + 18 + 41 =
  18. 18.47 + 23 + 24 + 67 =
  19. 19.32 + 11 + 30 + 19 =
  20. 20.85 + 33 + 26 + 55 =
  21. 21.47 + 34 + 72 + 11 =
  22. 22.89 + 30 + 42 + 75 =
  23. 23.30 + 69 + 51 + 30 =
  24. 24.47 + 28 + 20 + 87 =
  25. 25.60 + 60 + 85 + 78 =
  26. 26.76 + 13 + 76 + 75 =
  27. 27.56 + 64 + 79 + 20 =
  28. 28.85 + 61 + 84 + 19 =
  29. 29.74 + 51 + 14 + 71 =
  30. 30.16 + 27 + 48 + 84 =
  31. 31.33 + 28 + 81 + 58 =
  32. 32.80 + 33 + 27 + 81 =
  33. 33.52 + 89 + 48 + 32 =
  34. 34.53 + 48 + 11 + 23 =
  35. 35.35 + 72 + 21 + 54 =
  36. 36.75 + 68 + 46 + 89 =
  37. 37.82 + 66 + 48 + 15 =
  38. 38.17 + 34 + 64 + 89 =
  39. 39.32 + 40 + 78 + 80 =
  40. 40.25 + 56 + 42 + 24 =

Answer key

  1. 243
  2. 244
  3. 182
  4. 151
  5. 273
  6. 218
  7. 212
  8. 137
  9. 224
  10. 260
  11. 175
  12. 235
  13. 148
  14. 155
  15. 196
  16. 171
  17. 148
  18. 161
  19. 92
  20. 199
  21. 164
  22. 236
  23. 180
  24. 182
  25. 283
  26. 240
  27. 219
  28. 249
  29. 210
  30. 175
  31. 200
  32. 221
  33. 221
  34. 135
  35. 182
  36. 278
  37. 211
  38. 204
  39. 230
  40. 147

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