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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 621 · 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. 1.30 + 74 + 67 + 35 =
  2. 2.26 + 33 + 55 + 76 =
  3. 3.68 + 50 + 15 + 84 =
  4. 4.73 + 17 + 11 + 67 =
  5. 5.19 + 49 + 80 + 88 =
  6. 6.18 + 72 + 33 + 20 =
  7. 7.45 + 53 + 80 + 81 =
  8. 8.71 + 22 + 80 + 26 =
  9. 9.85 + 35 + 30 + 11 =
  10. 10.43 + 68 + 30 + 64 =
  11. 11.89 + 28 + 26 + 40 =
  12. 12.46 + 50 + 32 + 56 =
  13. 13.44 + 76 + 49 + 41 =
  14. 14.74 + 11 + 70 + 19 =
  15. 15.67 + 52 + 27 + 30 =
  16. 16.33 + 70 + 81 + 47 =
  17. 17.44 + 22 + 33 + 58 =
  18. 18.49 + 56 + 69 + 39 =
  19. 19.62 + 77 + 44 + 44 =
  20. 20.32 + 63 + 58 + 47 =
  21. 21.37 + 66 + 23 + 56 =
  22. 22.61 + 24 + 30 + 70 =
  23. 23.84 + 64 + 13 + 42 =
  24. 24.25 + 57 + 47 + 23 =
  25. 25.63 + 46 + 73 + 59 =
  26. 26.31 + 64 + 62 + 72 =
  27. 27.39 + 79 + 27 + 53 =
  28. 28.31 + 49 + 20 + 70 =
  29. 29.66 + 66 + 55 + 13 =
  30. 30.72 + 64 + 32 + 20 =
  31. 31.61 + 82 + 61 + 17 =
  32. 32.44 + 35 + 50 + 84 =
  33. 33.33 + 46 + 25 + 48 =
  34. 34.66 + 11 + 30 + 15 =
  35. 35.59 + 64 + 72 + 37 =
  36. 36.68 + 40 + 46 + 59 =
  37. 37.79 + 20 + 72 + 74 =
  38. 38.22 + 20 + 43 + 75 =
  39. 39.51 + 62 + 31 + 21 =
  40. 40.38 + 27 + 12 + 52 =

Answer key

  1. 206
  2. 190
  3. 217
  4. 168
  5. 236
  6. 143
  7. 259
  8. 199
  9. 161
  10. 205
  11. 183
  12. 184
  13. 210
  14. 174
  15. 176
  16. 231
  17. 157
  18. 213
  19. 227
  20. 200
  21. 182
  22. 185
  23. 203
  24. 152
  25. 241
  26. 229
  27. 198
  28. 170
  29. 200
  30. 188
  31. 221
  32. 213
  33. 152
  34. 122
  35. 232
  36. 213
  37. 245
  38. 160
  39. 165
  40. 129

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