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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 678 · 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. 1.17 + 39 + 30 + 85 =
  2. 2.55 + 11 + 33 + 87 =
  3. 3.14 + 54 + 21 + 23 =
  4. 4.16 + 67 + 52 + 22 =
  5. 5.83 + 56 + 50 + 14 =
  6. 6.80 + 25 + 17 + 71 =
  7. 7.18 + 11 + 23 + 79 =
  8. 8.77 + 62 + 88 + 46 =
  9. 9.83 + 38 + 32 + 12 =
  10. 10.73 + 65 + 13 + 37 =
  11. 11.23 + 66 + 72 + 70 =
  12. 12.72 + 31 + 50 + 81 =
  13. 13.72 + 72 + 24 + 61 =
  14. 14.50 + 35 + 53 + 40 =
  15. 15.13 + 57 + 52 + 17 =
  16. 16.32 + 86 + 83 + 51 =
  17. 17.80 + 36 + 87 + 67 =
  18. 18.25 + 56 + 73 + 31 =
  19. 19.86 + 47 + 61 + 46 =
  20. 20.76 + 81 + 27 + 61 =
  21. 21.40 + 26 + 50 + 26 =
  22. 22.74 + 18 + 54 + 16 =
  23. 23.79 + 14 + 17 + 47 =
  24. 24.39 + 53 + 17 + 80 =
  25. 25.67 + 71 + 62 + 21 =
  26. 26.86 + 17 + 74 + 42 =
  27. 27.22 + 20 + 15 + 60 =
  28. 28.87 + 52 + 13 + 78 =
  29. 29.32 + 52 + 83 + 16 =
  30. 30.29 + 72 + 52 + 35 =
  31. 31.12 + 25 + 66 + 41 =
  32. 32.40 + 31 + 79 + 29 =
  33. 33.80 + 15 + 15 + 12 =
  34. 34.87 + 64 + 67 + 47 =
  35. 35.15 + 27 + 78 + 16 =
  36. 36.52 + 51 + 31 + 77 =
  37. 37.31 + 79 + 54 + 82 =
  38. 38.25 + 73 + 55 + 51 =
  39. 39.15 + 32 + 61 + 87 =
  40. 40.81 + 64 + 44 + 40 =

Answer key

  1. 171
  2. 186
  3. 112
  4. 157
  5. 203
  6. 193
  7. 131
  8. 273
  9. 165
  10. 188
  11. 231
  12. 234
  13. 229
  14. 178
  15. 139
  16. 252
  17. 270
  18. 185
  19. 240
  20. 245
  21. 142
  22. 162
  23. 157
  24. 189
  25. 221
  26. 219
  27. 117
  28. 230
  29. 183
  30. 188
  31. 144
  32. 179
  33. 122
  34. 265
  35. 136
  36. 211
  37. 246
  38. 204
  39. 195
  40. 229

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