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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 646 · 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. 1.26 + 25 + 17 + 15 =
  2. 2.52 + 76 + 11 + 78 =
  3. 3.49 + 19 + 76 + 38 =
  4. 4.74 + 81 + 68 + 66 =
  5. 5.19 + 21 + 27 + 87 =
  6. 6.46 + 49 + 54 + 82 =
  7. 7.14 + 26 + 71 + 33 =
  8. 8.54 + 87 + 86 + 60 =
  9. 9.84 + 75 + 39 + 48 =
  10. 10.75 + 77 + 45 + 59 =
  11. 11.25 + 15 + 81 + 76 =
  12. 12.81 + 81 + 51 + 17 =
  13. 13.54 + 58 + 80 + 34 =
  14. 14.44 + 41 + 72 + 88 =
  15. 15.30 + 83 + 18 + 52 =
  16. 16.89 + 49 + 39 + 23 =
  17. 17.46 + 33 + 35 + 81 =
  18. 18.88 + 59 + 49 + 83 =
  19. 19.17 + 57 + 16 + 22 =
  20. 20.35 + 65 + 18 + 86 =
  21. 21.18 + 12 + 88 + 33 =
  22. 22.37 + 82 + 76 + 35 =
  23. 23.71 + 15 + 72 + 40 =
  24. 24.51 + 55 + 31 + 12 =
  25. 25.82 + 60 + 16 + 49 =
  26. 26.82 + 77 + 42 + 78 =
  27. 27.78 + 21 + 88 + 12 =
  28. 28.24 + 84 + 66 + 53 =
  29. 29.45 + 66 + 17 + 39 =
  30. 30.36 + 83 + 70 + 32 =
  31. 31.20 + 11 + 29 + 19 =
  32. 32.73 + 12 + 33 + 74 =
  33. 33.45 + 58 + 71 + 18 =
  34. 34.68 + 68 + 52 + 62 =
  35. 35.85 + 35 + 18 + 76 =
  36. 36.83 + 79 + 55 + 35 =
  37. 37.88 + 64 + 11 + 60 =
  38. 38.24 + 69 + 19 + 48 =
  39. 39.66 + 56 + 58 + 87 =
  40. 40.58 + 85 + 18 + 41 =

Answer key

  1. 83
  2. 217
  3. 182
  4. 289
  5. 154
  6. 231
  7. 144
  8. 287
  9. 246
  10. 256
  11. 197
  12. 230
  13. 226
  14. 245
  15. 183
  16. 200
  17. 195
  18. 279
  19. 112
  20. 204
  21. 151
  22. 230
  23. 198
  24. 149
  25. 207
  26. 279
  27. 199
  28. 227
  29. 167
  30. 221
  31. 79
  32. 192
  33. 192
  34. 250
  35. 214
  36. 252
  37. 223
  38. 160
  39. 267
  40. 202

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