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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 909 · 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. 1.70 + 68 + 83 + 52 =
  2. 2.21 + 18 + 80 + 40 =
  3. 3.24 + 50 + 80 + 77 =
  4. 4.60 + 56 + 70 + 44 =
  5. 5.32 + 81 + 37 + 46 =
  6. 6.61 + 28 + 11 + 41 =
  7. 7.47 + 18 + 36 + 82 =
  8. 8.40 + 21 + 85 + 29 =
  9. 9.71 + 24 + 22 + 74 =
  10. 10.63 + 50 + 29 + 89 =
  11. 11.24 + 39 + 49 + 26 =
  12. 12.82 + 27 + 77 + 86 =
  13. 13.69 + 70 + 88 + 25 =
  14. 14.71 + 18 + 30 + 24 =
  15. 15.41 + 20 + 76 + 34 =
  16. 16.73 + 80 + 56 + 19 =
  17. 17.48 + 38 + 69 + 42 =
  18. 18.65 + 15 + 86 + 31 =
  19. 19.56 + 83 + 77 + 34 =
  20. 20.40 + 35 + 46 + 17 =
  21. 21.84 + 25 + 88 + 47 =
  22. 22.37 + 15 + 17 + 35 =
  23. 23.37 + 74 + 47 + 88 =
  24. 24.68 + 86 + 63 + 22 =
  25. 25.56 + 43 + 74 + 14 =
  26. 26.78 + 19 + 64 + 19 =
  27. 27.53 + 78 + 21 + 45 =
  28. 28.32 + 16 + 27 + 31 =
  29. 29.46 + 52 + 12 + 12 =
  30. 30.69 + 41 + 60 + 47 =
  31. 31.63 + 35 + 60 + 82 =
  32. 32.78 + 14 + 68 + 53 =
  33. 33.30 + 16 + 74 + 25 =
  34. 34.18 + 63 + 20 + 53 =
  35. 35.46 + 69 + 17 + 29 =
  36. 36.55 + 75 + 61 + 43 =
  37. 37.57 + 72 + 32 + 26 =
  38. 38.44 + 40 + 20 + 27 =
  39. 39.17 + 82 + 22 + 33 =
  40. 40.32 + 37 + 18 + 22 =

Answer key

  1. 273
  2. 159
  3. 231
  4. 230
  5. 196
  6. 141
  7. 183
  8. 175
  9. 191
  10. 231
  11. 138
  12. 272
  13. 252
  14. 143
  15. 171
  16. 228
  17. 197
  18. 197
  19. 250
  20. 138
  21. 244
  22. 104
  23. 246
  24. 239
  25. 187
  26. 180
  27. 197
  28. 106
  29. 122
  30. 217
  31. 240
  32. 213
  33. 145
  34. 154
  35. 161
  36. 234
  37. 187
  38. 131
  39. 154
  40. 109

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