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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 519 · 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. 1.37 + 71 + 17 + 52 =
  2. 2.69 + 75 + 66 + 12 =
  3. 3.11 + 29 + 25 + 77 =
  4. 4.40 + 32 + 47 + 37 =
  5. 5.22 + 87 + 56 + 56 =
  6. 6.36 + 18 + 14 + 59 =
  7. 7.23 + 74 + 67 + 15 =
  8. 8.66 + 27 + 26 + 14 =
  9. 9.73 + 73 + 33 + 28 =
  10. 10.52 + 40 + 86 + 71 =
  11. 11.77 + 26 + 70 + 31 =
  12. 12.55 + 88 + 29 + 50 =
  13. 13.63 + 39 + 88 + 78 =
  14. 14.47 + 14 + 17 + 45 =
  15. 15.62 + 76 + 82 + 28 =
  16. 16.61 + 71 + 71 + 84 =
  17. 17.89 + 74 + 38 + 62 =
  18. 18.83 + 37 + 24 + 31 =
  19. 19.43 + 15 + 80 + 59 =
  20. 20.40 + 61 + 49 + 31 =
  21. 21.49 + 70 + 42 + 83 =
  22. 22.23 + 82 + 18 + 31 =
  23. 23.81 + 42 + 15 + 77 =
  24. 24.79 + 72 + 60 + 35 =
  25. 25.58 + 69 + 30 + 85 =
  26. 26.82 + 11 + 42 + 25 =
  27. 27.32 + 27 + 48 + 72 =
  28. 28.79 + 42 + 56 + 52 =
  29. 29.39 + 63 + 25 + 69 =
  30. 30.40 + 22 + 33 + 59 =
  31. 31.13 + 37 + 19 + 31 =
  32. 32.62 + 34 + 75 + 48 =
  33. 33.12 + 50 + 50 + 28 =
  34. 34.47 + 76 + 26 + 86 =
  35. 35.32 + 26 + 58 + 25 =
  36. 36.88 + 50 + 45 + 59 =
  37. 37.25 + 22 + 55 + 24 =
  38. 38.48 + 68 + 66 + 59 =
  39. 39.87 + 34 + 82 + 24 =
  40. 40.70 + 54 + 63 + 16 =

Answer key

  1. 177
  2. 222
  3. 142
  4. 156
  5. 221
  6. 127
  7. 179
  8. 133
  9. 207
  10. 249
  11. 204
  12. 222
  13. 268
  14. 123
  15. 248
  16. 287
  17. 263
  18. 175
  19. 197
  20. 181
  21. 244
  22. 154
  23. 215
  24. 246
  25. 242
  26. 160
  27. 179
  28. 229
  29. 196
  30. 154
  31. 100
  32. 219
  33. 140
  34. 235
  35. 141
  36. 242
  37. 126
  38. 241
  39. 227
  40. 203

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