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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 996 · 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. 1.17 + 30 + 59 + 82 =
  2. 2.57 + 78 + 63 + 17 =
  3. 3.37 + 40 + 56 + 83 =
  4. 4.19 + 11 + 22 + 63 =
  5. 5.24 + 27 + 26 + 40 =
  6. 6.65 + 68 + 14 + 38 =
  7. 7.15 + 11 + 27 + 89 =
  8. 8.79 + 47 + 29 + 25 =
  9. 9.59 + 88 + 32 + 88 =
  10. 10.46 + 81 + 73 + 18 =
  11. 11.64 + 73 + 63 + 11 =
  12. 12.71 + 32 + 38 + 51 =
  13. 13.29 + 58 + 25 + 23 =
  14. 14.47 + 26 + 82 + 58 =
  15. 15.11 + 45 + 26 + 24 =
  16. 16.56 + 14 + 59 + 29 =
  17. 17.13 + 23 + 67 + 57 =
  18. 18.25 + 66 + 30 + 46 =
  19. 19.39 + 73 + 20 + 67 =
  20. 20.79 + 82 + 49 + 38 =
  21. 21.20 + 62 + 82 + 78 =
  22. 22.86 + 15 + 15 + 30 =
  23. 23.31 + 52 + 42 + 15 =
  24. 24.20 + 61 + 77 + 12 =
  25. 25.83 + 44 + 79 + 19 =
  26. 26.40 + 64 + 52 + 20 =
  27. 27.25 + 28 + 47 + 39 =
  28. 28.27 + 52 + 42 + 37 =
  29. 29.45 + 34 + 24 + 85 =
  30. 30.57 + 25 + 67 + 23 =
  31. 31.87 + 76 + 39 + 21 =
  32. 32.20 + 78 + 31 + 82 =
  33. 33.71 + 50 + 66 + 29 =
  34. 34.24 + 84 + 28 + 60 =
  35. 35.35 + 50 + 44 + 27 =
  36. 36.39 + 85 + 46 + 59 =
  37. 37.17 + 34 + 42 + 62 =
  38. 38.31 + 40 + 89 + 39 =
  39. 39.70 + 81 + 33 + 20 =
  40. 40.33 + 73 + 45 + 27 =

Answer key

  1. 188
  2. 215
  3. 216
  4. 115
  5. 117
  6. 185
  7. 142
  8. 180
  9. 267
  10. 218
  11. 211
  12. 192
  13. 135
  14. 213
  15. 106
  16. 158
  17. 160
  18. 167
  19. 199
  20. 248
  21. 242
  22. 146
  23. 140
  24. 170
  25. 225
  26. 176
  27. 139
  28. 158
  29. 188
  30. 172
  31. 223
  32. 211
  33. 216
  34. 196
  35. 156
  36. 229
  37. 155
  38. 199
  39. 204
  40. 178

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