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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 844 · 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 + 83 + 46 + 27 =
  2. 2.44 + 78 + 54 + 70 =
  3. 3.89 + 86 + 26 + 75 =
  4. 4.50 + 35 + 38 + 54 =
  5. 5.25 + 78 + 66 + 58 =
  6. 6.38 + 19 + 84 + 23 =
  7. 7.69 + 58 + 61 + 25 =
  8. 8.63 + 84 + 52 + 46 =
  9. 9.54 + 26 + 56 + 82 =
  10. 10.79 + 39 + 78 + 85 =
  11. 11.40 + 88 + 49 + 75 =
  12. 12.89 + 57 + 89 + 50 =
  13. 13.50 + 51 + 11 + 32 =
  14. 14.63 + 69 + 66 + 78 =
  15. 15.69 + 64 + 78 + 20 =
  16. 16.48 + 86 + 43 + 22 =
  17. 17.58 + 30 + 13 + 72 =
  18. 18.51 + 88 + 54 + 41 =
  19. 19.26 + 18 + 54 + 86 =
  20. 20.68 + 65 + 17 + 89 =
  21. 21.12 + 61 + 61 + 50 =
  22. 22.88 + 63 + 72 + 27 =
  23. 23.61 + 67 + 71 + 31 =
  24. 24.30 + 34 + 34 + 31 =
  25. 25.79 + 14 + 20 + 61 =
  26. 26.73 + 69 + 88 + 42 =
  27. 27.40 + 47 + 24 + 57 =
  28. 28.87 + 39 + 66 + 84 =
  29. 29.58 + 58 + 49 + 53 =
  30. 30.71 + 37 + 18 + 87 =
  31. 31.49 + 81 + 31 + 69 =
  32. 32.34 + 52 + 31 + 43 =
  33. 33.89 + 53 + 77 + 74 =
  34. 34.63 + 47 + 15 + 51 =
  35. 35.15 + 52 + 44 + 16 =
  36. 36.63 + 31 + 26 + 89 =
  37. 37.63 + 27 + 12 + 33 =
  38. 38.32 + 73 + 54 + 61 =
  39. 39.33 + 86 + 31 + 11 =
  40. 40.34 + 83 + 11 + 37 =

Answer key

  1. 173
  2. 246
  3. 276
  4. 177
  5. 227
  6. 164
  7. 213
  8. 245
  9. 218
  10. 281
  11. 252
  12. 285
  13. 144
  14. 276
  15. 231
  16. 199
  17. 173
  18. 234
  19. 184
  20. 239
  21. 184
  22. 250
  23. 230
  24. 129
  25. 174
  26. 272
  27. 168
  28. 276
  29. 218
  30. 213
  31. 230
  32. 160
  33. 293
  34. 176
  35. 127
  36. 209
  37. 135
  38. 220
  39. 161
  40. 165

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