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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 790 · 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 + 14 + 19 + 26 =
  2. 2.78 + 21 + 25 + 51 =
  3. 3.11 + 72 + 37 + 53 =
  4. 4.84 + 74 + 11 + 27 =
  5. 5.64 + 66 + 37 + 81 =
  6. 6.67 + 21 + 12 + 12 =
  7. 7.11 + 58 + 61 + 49 =
  8. 8.89 + 77 + 62 + 43 =
  9. 9.20 + 47 + 24 + 26 =
  10. 10.17 + 58 + 61 + 68 =
  11. 11.56 + 32 + 15 + 71 =
  12. 12.85 + 23 + 61 + 41 =
  13. 13.67 + 14 + 11 + 46 =
  14. 14.55 + 85 + 87 + 38 =
  15. 15.68 + 22 + 75 + 39 =
  16. 16.19 + 35 + 21 + 59 =
  17. 17.14 + 69 + 59 + 12 =
  18. 18.24 + 40 + 11 + 26 =
  19. 19.19 + 44 + 89 + 41 =
  20. 20.31 + 30 + 52 + 31 =
  21. 21.28 + 22 + 23 + 41 =
  22. 22.34 + 29 + 39 + 27 =
  23. 23.35 + 51 + 62 + 43 =
  24. 24.36 + 34 + 55 + 25 =
  25. 25.62 + 42 + 59 + 89 =
  26. 26.49 + 63 + 15 + 32 =
  27. 27.54 + 83 + 76 + 80 =
  28. 28.21 + 36 + 72 + 22 =
  29. 29.42 + 47 + 42 + 17 =
  30. 30.21 + 33 + 50 + 29 =
  31. 31.34 + 75 + 62 + 24 =
  32. 32.59 + 80 + 24 + 30 =
  33. 33.75 + 60 + 12 + 40 =
  34. 34.84 + 24 + 43 + 14 =
  35. 35.32 + 47 + 88 + 14 =
  36. 36.78 + 83 + 64 + 38 =
  37. 37.37 + 25 + 82 + 51 =
  38. 38.53 + 12 + 46 + 44 =
  39. 39.49 + 72 + 67 + 38 =
  40. 40.87 + 81 + 34 + 39 =

Answer key

  1. 70
  2. 175
  3. 173
  4. 196
  5. 248
  6. 112
  7. 179
  8. 271
  9. 117
  10. 204
  11. 174
  12. 210
  13. 138
  14. 265
  15. 204
  16. 134
  17. 154
  18. 101
  19. 193
  20. 144
  21. 114
  22. 129
  23. 191
  24. 150
  25. 252
  26. 159
  27. 293
  28. 151
  29. 148
  30. 133
  31. 195
  32. 193
  33. 187
  34. 165
  35. 181
  36. 263
  37. 195
  38. 155
  39. 226
  40. 241

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