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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 858 · 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. 1.23 + 70 + 79 + 23 =
  2. 2.50 + 52 + 28 + 34 =
  3. 3.47 + 41 + 26 + 82 =
  4. 4.34 + 69 + 12 + 26 =
  5. 5.71 + 72 + 45 + 41 =
  6. 6.78 + 37 + 64 + 16 =
  7. 7.34 + 48 + 41 + 72 =
  8. 8.25 + 46 + 89 + 31 =
  9. 9.81 + 19 + 58 + 65 =
  10. 10.26 + 24 + 74 + 85 =
  11. 11.39 + 17 + 22 + 53 =
  12. 12.46 + 80 + 61 + 87 =
  13. 13.44 + 86 + 87 + 20 =
  14. 14.63 + 18 + 58 + 88 =
  15. 15.84 + 59 + 22 + 81 =
  16. 16.45 + 53 + 81 + 85 =
  17. 17.82 + 74 + 25 + 85 =
  18. 18.53 + 44 + 72 + 13 =
  19. 19.41 + 20 + 42 + 77 =
  20. 20.18 + 49 + 47 + 89 =
  21. 21.83 + 14 + 75 + 78 =
  22. 22.59 + 25 + 89 + 89 =
  23. 23.83 + 18 + 37 + 33 =
  24. 24.72 + 13 + 59 + 40 =
  25. 25.39 + 54 + 18 + 14 =
  26. 26.79 + 73 + 18 + 23 =
  27. 27.29 + 81 + 15 + 33 =
  28. 28.37 + 73 + 26 + 34 =
  29. 29.75 + 19 + 64 + 73 =
  30. 30.44 + 21 + 68 + 20 =
  31. 31.23 + 41 + 25 + 57 =
  32. 32.59 + 52 + 56 + 43 =
  33. 33.39 + 26 + 74 + 65 =
  34. 34.62 + 67 + 13 + 37 =
  35. 35.81 + 51 + 28 + 57 =
  36. 36.19 + 67 + 21 + 27 =
  37. 37.50 + 31 + 79 + 30 =
  38. 38.28 + 22 + 49 + 43 =
  39. 39.64 + 19 + 26 + 77 =
  40. 40.23 + 20 + 82 + 37 =

Answer key

  1. 195
  2. 164
  3. 196
  4. 141
  5. 229
  6. 195
  7. 195
  8. 191
  9. 223
  10. 209
  11. 131
  12. 274
  13. 237
  14. 227
  15. 246
  16. 264
  17. 266
  18. 182
  19. 180
  20. 203
  21. 250
  22. 262
  23. 171
  24. 184
  25. 125
  26. 193
  27. 158
  28. 170
  29. 231
  30. 153
  31. 146
  32. 210
  33. 204
  34. 179
  35. 217
  36. 134
  37. 190
  38. 142
  39. 186
  40. 162

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