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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 933 · 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. 1.40 + 42 + 73 + 75 =
  2. 2.61 + 47 + 71 + 62 =
  3. 3.15 + 86 + 27 + 15 =
  4. 4.14 + 35 + 86 + 88 =
  5. 5.16 + 83 + 73 + 71 =
  6. 6.27 + 46 + 31 + 22 =
  7. 7.50 + 55 + 54 + 11 =
  8. 8.25 + 87 + 24 + 20 =
  9. 9.77 + 16 + 25 + 65 =
  10. 10.32 + 87 + 36 + 56 =
  11. 11.73 + 30 + 26 + 58 =
  12. 12.38 + 88 + 20 + 34 =
  13. 13.70 + 82 + 67 + 23 =
  14. 14.76 + 68 + 19 + 46 =
  15. 15.71 + 46 + 70 + 61 =
  16. 16.19 + 22 + 82 + 44 =
  17. 17.33 + 26 + 89 + 54 =
  18. 18.68 + 82 + 24 + 67 =
  19. 19.49 + 63 + 88 + 29 =
  20. 20.40 + 76 + 24 + 77 =
  21. 21.82 + 21 + 42 + 64 =
  22. 22.40 + 23 + 84 + 71 =
  23. 23.33 + 30 + 19 + 40 =
  24. 24.51 + 29 + 13 + 25 =
  25. 25.26 + 72 + 33 + 34 =
  26. 26.36 + 20 + 35 + 38 =
  27. 27.39 + 29 + 60 + 31 =
  28. 28.65 + 63 + 68 + 75 =
  29. 29.26 + 28 + 17 + 79 =
  30. 30.25 + 22 + 33 + 56 =
  31. 31.88 + 41 + 58 + 59 =
  32. 32.31 + 28 + 72 + 27 =
  33. 33.37 + 38 + 13 + 42 =
  34. 34.17 + 62 + 70 + 19 =
  35. 35.65 + 25 + 81 + 84 =
  36. 36.31 + 40 + 50 + 89 =
  37. 37.62 + 77 + 62 + 89 =
  38. 38.66 + 42 + 47 + 55 =
  39. 39.32 + 53 + 42 + 16 =
  40. 40.57 + 23 + 33 + 60 =

Answer key

  1. 230
  2. 241
  3. 143
  4. 223
  5. 243
  6. 126
  7. 170
  8. 156
  9. 183
  10. 211
  11. 187
  12. 180
  13. 242
  14. 209
  15. 248
  16. 167
  17. 202
  18. 241
  19. 229
  20. 217
  21. 209
  22. 218
  23. 122
  24. 118
  25. 165
  26. 129
  27. 159
  28. 271
  29. 150
  30. 136
  31. 246
  32. 158
  33. 130
  34. 168
  35. 255
  36. 210
  37. 290
  38. 210
  39. 143
  40. 173

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