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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 968 · 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 + 45 + 13 + 41 =
  2. 2.70 + 18 + 61 + 50 =
  3. 3.16 + 27 + 30 + 14 =
  4. 4.75 + 69 + 87 + 79 =
  5. 5.34 + 60 + 19 + 77 =
  6. 6.49 + 11 + 25 + 38 =
  7. 7.28 + 45 + 24 + 17 =
  8. 8.54 + 12 + 21 + 41 =
  9. 9.17 + 26 + 21 + 85 =
  10. 10.45 + 28 + 73 + 42 =
  11. 11.83 + 33 + 40 + 41 =
  12. 12.70 + 79 + 78 + 85 =
  13. 13.44 + 25 + 84 + 46 =
  14. 14.42 + 35 + 73 + 79 =
  15. 15.41 + 52 + 80 + 45 =
  16. 16.70 + 81 + 40 + 54 =
  17. 17.68 + 63 + 70 + 83 =
  18. 18.60 + 43 + 74 + 47 =
  19. 19.33 + 43 + 20 + 46 =
  20. 20.15 + 69 + 82 + 29 =
  21. 21.83 + 28 + 31 + 38 =
  22. 22.52 + 82 + 78 + 19 =
  23. 23.80 + 76 + 25 + 76 =
  24. 24.60 + 22 + 41 + 25 =
  25. 25.13 + 42 + 72 + 12 =
  26. 26.31 + 20 + 14 + 82 =
  27. 27.55 + 14 + 80 + 82 =
  28. 28.54 + 77 + 75 + 14 =
  29. 29.25 + 60 + 74 + 73 =
  30. 30.78 + 68 + 60 + 46 =
  31. 31.76 + 58 + 50 + 33 =
  32. 32.26 + 20 + 17 + 14 =
  33. 33.39 + 33 + 75 + 66 =
  34. 34.45 + 38 + 78 + 83 =
  35. 35.87 + 79 + 47 + 22 =
  36. 36.26 + 51 + 39 + 20 =
  37. 37.45 + 60 + 81 + 56 =
  38. 38.50 + 58 + 49 + 36 =
  39. 39.79 + 49 + 18 + 20 =
  40. 40.25 + 19 + 40 + 73 =

Answer key

  1. 125
  2. 199
  3. 87
  4. 310
  5. 190
  6. 123
  7. 114
  8. 128
  9. 149
  10. 188
  11. 197
  12. 312
  13. 199
  14. 229
  15. 218
  16. 245
  17. 284
  18. 224
  19. 142
  20. 195
  21. 180
  22. 231
  23. 257
  24. 148
  25. 139
  26. 147
  27. 231
  28. 220
  29. 232
  30. 252
  31. 217
  32. 77
  33. 213
  34. 244
  35. 235
  36. 136
  37. 242
  38. 193
  39. 166
  40. 157

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