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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 715 · 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. 1.11 + 16 + 41 + 79 =
  2. 2.50 + 21 + 76 + 54 =
  3. 3.26 + 46 + 47 + 12 =
  4. 4.36 + 32 + 21 + 19 =
  5. 5.69 + 51 + 37 + 62 =
  6. 6.16 + 45 + 51 + 25 =
  7. 7.47 + 77 + 59 + 59 =
  8. 8.64 + 65 + 85 + 57 =
  9. 9.12 + 30 + 48 + 37 =
  10. 10.68 + 60 + 21 + 71 =
  11. 11.15 + 64 + 76 + 34 =
  12. 12.37 + 60 + 19 + 45 =
  13. 13.65 + 34 + 85 + 18 =
  14. 14.51 + 65 + 76 + 75 =
  15. 15.22 + 41 + 53 + 41 =
  16. 16.85 + 74 + 30 + 33 =
  17. 17.27 + 40 + 44 + 78 =
  18. 18.17 + 45 + 76 + 30 =
  19. 19.12 + 36 + 68 + 37 =
  20. 20.41 + 30 + 65 + 76 =
  21. 21.84 + 68 + 25 + 12 =
  22. 22.47 + 86 + 27 + 65 =
  23. 23.64 + 83 + 41 + 27 =
  24. 24.83 + 62 + 70 + 47 =
  25. 25.31 + 88 + 63 + 18 =
  26. 26.65 + 40 + 65 + 48 =
  27. 27.66 + 66 + 88 + 12 =
  28. 28.14 + 34 + 24 + 24 =
  29. 29.11 + 22 + 11 + 49 =
  30. 30.73 + 13 + 42 + 88 =
  31. 31.28 + 12 + 55 + 35 =
  32. 32.16 + 51 + 24 + 11 =
  33. 33.86 + 52 + 55 + 37 =
  34. 34.34 + 82 + 37 + 40 =
  35. 35.63 + 49 + 47 + 14 =
  36. 36.52 + 35 + 17 + 58 =
  37. 37.25 + 57 + 89 + 65 =
  38. 38.46 + 89 + 20 + 86 =
  39. 39.49 + 40 + 17 + 49 =
  40. 40.21 + 73 + 62 + 66 =

Answer key

  1. 147
  2. 201
  3. 131
  4. 108
  5. 219
  6. 137
  7. 242
  8. 271
  9. 127
  10. 220
  11. 189
  12. 161
  13. 202
  14. 267
  15. 157
  16. 222
  17. 189
  18. 168
  19. 153
  20. 212
  21. 189
  22. 225
  23. 215
  24. 262
  25. 200
  26. 218
  27. 232
  28. 96
  29. 93
  30. 216
  31. 130
  32. 102
  33. 230
  34. 193
  35. 173
  36. 162
  37. 236
  38. 241
  39. 155
  40. 222

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