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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 853 · 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. 1.79 + 75 + 52 + 22 =
  2. 2.39 + 33 + 23 + 43 =
  3. 3.62 + 44 + 73 + 86 =
  4. 4.69 + 14 + 24 + 76 =
  5. 5.74 + 77 + 46 + 59 =
  6. 6.20 + 78 + 35 + 68 =
  7. 7.61 + 40 + 11 + 63 =
  8. 8.75 + 66 + 86 + 38 =
  9. 9.86 + 57 + 33 + 49 =
  10. 10.55 + 79 + 31 + 33 =
  11. 11.23 + 63 + 38 + 13 =
  12. 12.28 + 16 + 70 + 14 =
  13. 13.70 + 49 + 68 + 31 =
  14. 14.12 + 71 + 62 + 69 =
  15. 15.52 + 54 + 53 + 16 =
  16. 16.43 + 38 + 13 + 73 =
  17. 17.45 + 49 + 74 + 23 =
  18. 18.82 + 21 + 54 + 14 =
  19. 19.72 + 19 + 78 + 21 =
  20. 20.88 + 63 + 21 + 68 =
  21. 21.43 + 37 + 39 + 19 =
  22. 22.20 + 44 + 11 + 25 =
  23. 23.87 + 52 + 17 + 59 =
  24. 24.58 + 35 + 77 + 23 =
  25. 25.63 + 30 + 37 + 17 =
  26. 26.45 + 13 + 65 + 14 =
  27. 27.31 + 89 + 23 + 26 =
  28. 28.11 + 76 + 43 + 64 =
  29. 29.23 + 17 + 23 + 69 =
  30. 30.85 + 71 + 21 + 21 =
  31. 31.73 + 82 + 71 + 15 =
  32. 32.89 + 73 + 31 + 19 =
  33. 33.81 + 63 + 50 + 35 =
  34. 34.50 + 64 + 28 + 19 =
  35. 35.13 + 18 + 29 + 73 =
  36. 36.81 + 60 + 33 + 61 =
  37. 37.55 + 22 + 32 + 20 =
  38. 38.39 + 31 + 83 + 72 =
  39. 39.82 + 30 + 24 + 65 =
  40. 40.23 + 20 + 84 + 55 =

Answer key

  1. 228
  2. 138
  3. 265
  4. 183
  5. 256
  6. 201
  7. 175
  8. 265
  9. 225
  10. 198
  11. 137
  12. 128
  13. 218
  14. 214
  15. 175
  16. 167
  17. 191
  18. 171
  19. 190
  20. 240
  21. 138
  22. 100
  23. 215
  24. 193
  25. 147
  26. 137
  27. 169
  28. 194
  29. 132
  30. 198
  31. 241
  32. 212
  33. 229
  34. 161
  35. 133
  36. 235
  37. 129
  38. 225
  39. 201
  40. 182

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