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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 655 · 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. 1.89 + 71 + 32 + 84 =
  2. 2.39 + 15 + 17 + 78 =
  3. 3.79 + 30 + 52 + 25 =
  4. 4.81 + 52 + 63 + 89 =
  5. 5.23 + 77 + 25 + 28 =
  6. 6.17 + 17 + 27 + 31 =
  7. 7.23 + 35 + 56 + 55 =
  8. 8.31 + 43 + 13 + 83 =
  9. 9.27 + 72 + 63 + 32 =
  10. 10.53 + 26 + 88 + 80 =
  11. 11.14 + 66 + 80 + 59 =
  12. 12.40 + 41 + 27 + 87 =
  13. 13.51 + 89 + 73 + 47 =
  14. 14.22 + 24 + 19 + 22 =
  15. 15.44 + 65 + 76 + 19 =
  16. 16.26 + 14 + 85 + 49 =
  17. 17.78 + 60 + 89 + 14 =
  18. 18.44 + 14 + 88 + 64 =
  19. 19.75 + 52 + 72 + 68 =
  20. 20.68 + 35 + 76 + 60 =
  21. 21.79 + 16 + 68 + 80 =
  22. 22.46 + 39 + 13 + 47 =
  23. 23.27 + 59 + 52 + 11 =
  24. 24.55 + 22 + 67 + 27 =
  25. 25.48 + 21 + 54 + 70 =
  26. 26.39 + 34 + 31 + 39 =
  27. 27.72 + 77 + 48 + 55 =
  28. 28.70 + 88 + 80 + 38 =
  29. 29.48 + 15 + 53 + 57 =
  30. 30.11 + 80 + 29 + 79 =
  31. 31.13 + 30 + 22 + 67 =
  32. 32.61 + 27 + 50 + 33 =
  33. 33.82 + 53 + 28 + 87 =
  34. 34.61 + 75 + 57 + 49 =
  35. 35.72 + 54 + 41 + 11 =
  36. 36.61 + 53 + 39 + 42 =
  37. 37.26 + 50 + 16 + 23 =
  38. 38.62 + 31 + 11 + 71 =
  39. 39.69 + 77 + 22 + 72 =
  40. 40.57 + 14 + 12 + 82 =

Answer key

  1. 276
  2. 149
  3. 186
  4. 285
  5. 153
  6. 92
  7. 169
  8. 170
  9. 194
  10. 247
  11. 219
  12. 195
  13. 260
  14. 87
  15. 204
  16. 174
  17. 241
  18. 210
  19. 267
  20. 239
  21. 243
  22. 145
  23. 149
  24. 171
  25. 193
  26. 143
  27. 252
  28. 276
  29. 173
  30. 199
  31. 132
  32. 171
  33. 250
  34. 242
  35. 178
  36. 195
  37. 115
  38. 175
  39. 240
  40. 165

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