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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 166 · 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. 1.27 + 13 + 82 + 45 =
  2. 2.44 + 12 + 70 + 13 =
  3. 3.76 + 72 + 67 + 81 =
  4. 4.40 + 83 + 29 + 88 =
  5. 5.44 + 51 + 65 + 62 =
  6. 6.31 + 39 + 61 + 85 =
  7. 7.54 + 41 + 22 + 37 =
  8. 8.44 + 12 + 81 + 44 =
  9. 9.86 + 59 + 55 + 14 =
  10. 10.17 + 70 + 33 + 58 =
  11. 11.29 + 17 + 37 + 34 =
  12. 12.71 + 27 + 61 + 68 =
  13. 13.16 + 62 + 21 + 71 =
  14. 14.35 + 80 + 24 + 27 =
  15. 15.12 + 63 + 41 + 83 =
  16. 16.47 + 66 + 45 + 68 =
  17. 17.26 + 55 + 29 + 41 =
  18. 18.72 + 41 + 21 + 24 =
  19. 19.64 + 15 + 81 + 33 =
  20. 20.20 + 87 + 89 + 55 =
  21. 21.86 + 26 + 89 + 46 =
  22. 22.49 + 71 + 32 + 16 =
  23. 23.49 + 17 + 25 + 14 =
  24. 24.75 + 11 + 45 + 56 =
  25. 25.17 + 57 + 87 + 60 =
  26. 26.51 + 32 + 23 + 79 =
  27. 27.76 + 41 + 88 + 15 =
  28. 28.66 + 21 + 35 + 30 =
  29. 29.33 + 31 + 59 + 44 =
  30. 30.18 + 61 + 21 + 37 =
  31. 31.50 + 47 + 76 + 27 =
  32. 32.18 + 47 + 24 + 85 =
  33. 33.44 + 72 + 35 + 17 =
  34. 34.42 + 77 + 75 + 18 =
  35. 35.54 + 80 + 59 + 82 =
  36. 36.41 + 23 + 70 + 40 =
  37. 37.15 + 44 + 43 + 31 =
  38. 38.34 + 25 + 49 + 25 =
  39. 39.43 + 74 + 36 + 19 =
  40. 40.13 + 21 + 12 + 67 =

Answer key

  1. 167
  2. 139
  3. 296
  4. 240
  5. 222
  6. 216
  7. 154
  8. 181
  9. 214
  10. 178
  11. 117
  12. 227
  13. 170
  14. 166
  15. 199
  16. 226
  17. 151
  18. 158
  19. 193
  20. 251
  21. 247
  22. 168
  23. 105
  24. 187
  25. 221
  26. 185
  27. 220
  28. 152
  29. 167
  30. 137
  31. 200
  32. 174
  33. 168
  34. 212
  35. 275
  36. 174
  37. 133
  38. 133
  39. 172
  40. 113

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