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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 289 · 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. 1.52 + 48 + 35 + 50 =
  2. 2.44 + 11 + 21 + 29 =
  3. 3.44 + 67 + 51 + 50 =
  4. 4.28 + 70 + 45 + 84 =
  5. 5.80 + 63 + 28 + 23 =
  6. 6.78 + 37 + 73 + 64 =
  7. 7.48 + 88 + 14 + 15 =
  8. 8.52 + 23 + 64 + 16 =
  9. 9.17 + 26 + 79 + 35 =
  10. 10.72 + 46 + 76 + 17 =
  11. 11.45 + 73 + 15 + 80 =
  12. 12.51 + 57 + 73 + 29 =
  13. 13.89 + 28 + 50 + 54 =
  14. 14.81 + 12 + 27 + 38 =
  15. 15.38 + 59 + 69 + 65 =
  16. 16.27 + 83 + 15 + 13 =
  17. 17.22 + 47 + 23 + 13 =
  18. 18.55 + 70 + 86 + 87 =
  19. 19.74 + 49 + 86 + 64 =
  20. 20.17 + 34 + 18 + 32 =
  21. 21.22 + 52 + 39 + 38 =
  22. 22.36 + 22 + 62 + 39 =
  23. 23.11 + 57 + 45 + 38 =
  24. 24.84 + 49 + 34 + 85 =
  25. 25.20 + 26 + 75 + 13 =
  26. 26.83 + 53 + 80 + 73 =
  27. 27.23 + 33 + 18 + 78 =
  28. 28.20 + 57 + 58 + 11 =
  29. 29.31 + 51 + 51 + 31 =
  30. 30.67 + 22 + 17 + 31 =
  31. 31.15 + 39 + 31 + 46 =
  32. 32.75 + 45 + 15 + 78 =
  33. 33.14 + 45 + 11 + 50 =
  34. 34.46 + 27 + 19 + 39 =
  35. 35.85 + 64 + 12 + 26 =
  36. 36.23 + 56 + 40 + 66 =
  37. 37.40 + 16 + 73 + 25 =
  38. 38.66 + 78 + 14 + 17 =
  39. 39.17 + 52 + 70 + 19 =
  40. 40.67 + 59 + 14 + 14 =

Answer key

  1. 185
  2. 105
  3. 212
  4. 227
  5. 194
  6. 252
  7. 165
  8. 155
  9. 157
  10. 211
  11. 213
  12. 210
  13. 221
  14. 158
  15. 231
  16. 138
  17. 105
  18. 298
  19. 273
  20. 101
  21. 151
  22. 159
  23. 151
  24. 252
  25. 134
  26. 289
  27. 152
  28. 146
  29. 164
  30. 137
  31. 131
  32. 213
  33. 120
  34. 131
  35. 187
  36. 185
  37. 154
  38. 175
  39. 158
  40. 154

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