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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 825 · 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. 1.38 + 57 + 18 + 88 =
  2. 2.32 + 51 + 77 + 27 =
  3. 3.29 + 19 + 57 + 53 =
  4. 4.50 + 79 + 73 + 21 =
  5. 5.58 + 68 + 43 + 32 =
  6. 6.31 + 73 + 38 + 50 =
  7. 7.89 + 77 + 21 + 51 =
  8. 8.23 + 36 + 88 + 13 =
  9. 9.24 + 79 + 58 + 17 =
  10. 10.29 + 55 + 89 + 60 =
  11. 11.71 + 27 + 12 + 12 =
  12. 12.30 + 79 + 48 + 23 =
  13. 13.25 + 18 + 47 + 85 =
  14. 14.40 + 45 + 49 + 32 =
  15. 15.35 + 34 + 45 + 23 =
  16. 16.31 + 67 + 19 + 38 =
  17. 17.27 + 71 + 24 + 58 =
  18. 18.85 + 42 + 59 + 83 =
  19. 19.12 + 28 + 13 + 85 =
  20. 20.83 + 11 + 41 + 29 =
  21. 21.47 + 30 + 55 + 80 =
  22. 22.73 + 87 + 55 + 56 =
  23. 23.86 + 21 + 35 + 66 =
  24. 24.43 + 29 + 20 + 49 =
  25. 25.27 + 40 + 66 + 29 =
  26. 26.37 + 67 + 29 + 67 =
  27. 27.79 + 71 + 35 + 14 =
  28. 28.77 + 17 + 37 + 81 =
  29. 29.51 + 51 + 49 + 83 =
  30. 30.88 + 47 + 85 + 22 =
  31. 31.17 + 54 + 18 + 49 =
  32. 32.16 + 50 + 58 + 69 =
  33. 33.36 + 85 + 33 + 53 =
  34. 34.56 + 18 + 84 + 35 =
  35. 35.38 + 85 + 55 + 28 =
  36. 36.35 + 50 + 48 + 84 =
  37. 37.14 + 20 + 37 + 63 =
  38. 38.71 + 15 + 39 + 42 =
  39. 39.83 + 41 + 16 + 87 =
  40. 40.39 + 74 + 48 + 45 =

Answer key

  1. 201
  2. 187
  3. 158
  4. 223
  5. 201
  6. 192
  7. 238
  8. 160
  9. 178
  10. 233
  11. 122
  12. 180
  13. 175
  14. 166
  15. 137
  16. 155
  17. 180
  18. 269
  19. 138
  20. 164
  21. 212
  22. 271
  23. 208
  24. 141
  25. 162
  26. 200
  27. 199
  28. 212
  29. 234
  30. 242
  31. 138
  32. 193
  33. 207
  34. 193
  35. 206
  36. 217
  37. 134
  38. 167
  39. 227
  40. 206

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