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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 874 · 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 + 31 + 89 + 68 =
  2. 2.20 + 19 + 73 + 37 =
  3. 3.33 + 87 + 74 + 75 =
  4. 4.77 + 24 + 52 + 74 =
  5. 5.66 + 36 + 75 + 77 =
  6. 6.26 + 72 + 53 + 47 =
  7. 7.62 + 43 + 32 + 78 =
  8. 8.25 + 15 + 47 + 58 =
  9. 9.46 + 37 + 21 + 19 =
  10. 10.15 + 67 + 15 + 78 =
  11. 11.48 + 12 + 26 + 69 =
  12. 12.87 + 28 + 67 + 59 =
  13. 13.33 + 72 + 78 + 33 =
  14. 14.77 + 44 + 89 + 35 =
  15. 15.41 + 27 + 12 + 38 =
  16. 16.81 + 67 + 68 + 78 =
  17. 17.40 + 29 + 19 + 68 =
  18. 18.74 + 83 + 39 + 60 =
  19. 19.11 + 18 + 85 + 22 =
  20. 20.77 + 57 + 38 + 36 =
  21. 21.52 + 82 + 30 + 68 =
  22. 22.53 + 52 + 51 + 87 =
  23. 23.46 + 16 + 71 + 49 =
  24. 24.87 + 88 + 67 + 56 =
  25. 25.38 + 78 + 36 + 56 =
  26. 26.86 + 37 + 11 + 21 =
  27. 27.71 + 30 + 55 + 19 =
  28. 28.17 + 49 + 73 + 56 =
  29. 29.31 + 30 + 33 + 50 =
  30. 30.44 + 82 + 24 + 51 =
  31. 31.56 + 52 + 15 + 15 =
  32. 32.38 + 27 + 85 + 82 =
  33. 33.22 + 47 + 21 + 20 =
  34. 34.30 + 25 + 59 + 52 =
  35. 35.12 + 56 + 32 + 87 =
  36. 36.67 + 50 + 28 + 55 =
  37. 37.15 + 89 + 87 + 71 =
  38. 38.17 + 39 + 89 + 13 =
  39. 39.61 + 17 + 23 + 55 =
  40. 40.15 + 60 + 58 + 24 =

Answer key

  1. 219
  2. 149
  3. 269
  4. 227
  5. 254
  6. 198
  7. 215
  8. 145
  9. 123
  10. 175
  11. 155
  12. 241
  13. 216
  14. 245
  15. 118
  16. 294
  17. 156
  18. 256
  19. 136
  20. 208
  21. 232
  22. 243
  23. 182
  24. 298
  25. 208
  26. 155
  27. 175
  28. 195
  29. 144
  30. 201
  31. 138
  32. 232
  33. 110
  34. 166
  35. 187
  36. 200
  37. 262
  38. 158
  39. 156
  40. 157

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