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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 668 · 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. 1.31 + 54 + 81 + 15 =
  2. 2.59 + 24 + 21 + 17 =
  3. 3.66 + 34 + 29 + 27 =
  4. 4.31 + 46 + 66 + 87 =
  5. 5.80 + 15 + 38 + 45 =
  6. 6.41 + 80 + 42 + 51 =
  7. 7.28 + 23 + 39 + 68 =
  8. 8.76 + 89 + 47 + 14 =
  9. 9.21 + 34 + 33 + 83 =
  10. 10.28 + 45 + 73 + 48 =
  11. 11.59 + 12 + 22 + 18 =
  12. 12.67 + 39 + 51 + 54 =
  13. 13.79 + 70 + 20 + 73 =
  14. 14.73 + 43 + 71 + 77 =
  15. 15.61 + 52 + 41 + 41 =
  16. 16.60 + 52 + 89 + 84 =
  17. 17.62 + 86 + 19 + 19 =
  18. 18.55 + 41 + 72 + 66 =
  19. 19.50 + 14 + 83 + 60 =
  20. 20.11 + 29 + 44 + 55 =
  21. 21.86 + 82 + 56 + 68 =
  22. 22.79 + 82 + 62 + 74 =
  23. 23.79 + 79 + 23 + 23 =
  24. 24.76 + 51 + 34 + 83 =
  25. 25.72 + 78 + 24 + 83 =
  26. 26.82 + 69 + 38 + 49 =
  27. 27.48 + 42 + 37 + 61 =
  28. 28.49 + 29 + 75 + 29 =
  29. 29.57 + 76 + 47 + 19 =
  30. 30.26 + 55 + 38 + 14 =
  31. 31.70 + 48 + 84 + 33 =
  32. 32.37 + 57 + 68 + 72 =
  33. 33.86 + 68 + 63 + 65 =
  34. 34.21 + 83 + 37 + 30 =
  35. 35.27 + 52 + 47 + 79 =
  36. 36.18 + 37 + 51 + 36 =
  37. 37.38 + 47 + 55 + 60 =
  38. 38.85 + 21 + 71 + 87 =
  39. 39.14 + 49 + 89 + 25 =
  40. 40.66 + 44 + 66 + 49 =

Answer key

  1. 181
  2. 121
  3. 156
  4. 230
  5. 178
  6. 214
  7. 158
  8. 226
  9. 171
  10. 194
  11. 111
  12. 211
  13. 242
  14. 264
  15. 195
  16. 285
  17. 186
  18. 234
  19. 207
  20. 139
  21. 292
  22. 297
  23. 204
  24. 244
  25. 257
  26. 238
  27. 188
  28. 182
  29. 199
  30. 133
  31. 235
  32. 234
  33. 282
  34. 171
  35. 205
  36. 142
  37. 200
  38. 264
  39. 177
  40. 225

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