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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 859 · 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. 1.13 + 51 + 80 + 21 =
  2. 2.62 + 74 + 12 + 30 =
  3. 3.22 + 36 + 23 + 33 =
  4. 4.82 + 17 + 80 + 26 =
  5. 5.77 + 78 + 25 + 39 =
  6. 6.77 + 40 + 41 + 15 =
  7. 7.48 + 31 + 39 + 68 =
  8. 8.64 + 80 + 28 + 28 =
  9. 9.76 + 41 + 84 + 30 =
  10. 10.15 + 28 + 31 + 34 =
  11. 11.65 + 13 + 20 + 87 =
  12. 12.44 + 15 + 34 + 55 =
  13. 13.18 + 38 + 35 + 72 =
  14. 14.64 + 61 + 63 + 75 =
  15. 15.43 + 52 + 33 + 67 =
  16. 16.12 + 60 + 83 + 32 =
  17. 17.53 + 45 + 39 + 35 =
  18. 18.12 + 82 + 19 + 39 =
  19. 19.78 + 71 + 67 + 19 =
  20. 20.38 + 20 + 67 + 51 =
  21. 21.56 + 31 + 43 + 86 =
  22. 22.83 + 39 + 73 + 30 =
  23. 23.67 + 83 + 80 + 17 =
  24. 24.32 + 27 + 45 + 79 =
  25. 25.53 + 17 + 42 + 47 =
  26. 26.20 + 48 + 62 + 17 =
  27. 27.75 + 51 + 60 + 64 =
  28. 28.49 + 21 + 22 + 49 =
  29. 29.26 + 43 + 23 + 62 =
  30. 30.63 + 79 + 89 + 21 =
  31. 31.78 + 81 + 68 + 17 =
  32. 32.16 + 45 + 79 + 78 =
  33. 33.46 + 63 + 80 + 30 =
  34. 34.17 + 42 + 56 + 50 =
  35. 35.24 + 28 + 34 + 73 =
  36. 36.54 + 57 + 56 + 11 =
  37. 37.89 + 46 + 12 + 66 =
  38. 38.33 + 11 + 63 + 34 =
  39. 39.25 + 70 + 38 + 67 =
  40. 40.19 + 82 + 41 + 81 =

Answer key

  1. 165
  2. 178
  3. 114
  4. 205
  5. 219
  6. 173
  7. 186
  8. 200
  9. 231
  10. 108
  11. 185
  12. 148
  13. 163
  14. 263
  15. 195
  16. 187
  17. 172
  18. 152
  19. 235
  20. 176
  21. 216
  22. 225
  23. 247
  24. 183
  25. 159
  26. 147
  27. 250
  28. 141
  29. 154
  30. 252
  31. 244
  32. 218
  33. 219
  34. 165
  35. 159
  36. 178
  37. 213
  38. 141
  39. 200
  40. 223

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