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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 97 · 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. 1.76 + 51 + 26 + 52 =
  2. 2.77 + 11 + 22 + 15 =
  3. 3.71 + 35 + 27 + 86 =
  4. 4.17 + 26 + 30 + 76 =
  5. 5.22 + 27 + 66 + 67 =
  6. 6.80 + 11 + 83 + 60 =
  7. 7.65 + 71 + 28 + 71 =
  8. 8.53 + 68 + 45 + 54 =
  9. 9.49 + 70 + 41 + 37 =
  10. 10.59 + 66 + 82 + 59 =
  11. 11.49 + 62 + 83 + 76 =
  12. 12.42 + 17 + 83 + 73 =
  13. 13.62 + 18 + 58 + 52 =
  14. 14.84 + 73 + 20 + 84 =
  15. 15.76 + 69 + 57 + 33 =
  16. 16.29 + 36 + 31 + 12 =
  17. 17.60 + 58 + 14 + 53 =
  18. 18.88 + 52 + 36 + 54 =
  19. 19.25 + 25 + 66 + 57 =
  20. 20.74 + 34 + 58 + 46 =
  21. 21.41 + 28 + 18 + 79 =
  22. 22.22 + 57 + 40 + 61 =
  23. 23.31 + 19 + 78 + 83 =
  24. 24.48 + 62 + 25 + 31 =
  25. 25.41 + 37 + 12 + 81 =
  26. 26.20 + 68 + 75 + 87 =
  27. 27.16 + 35 + 53 + 53 =
  28. 28.68 + 81 + 66 + 79 =
  29. 29.48 + 41 + 12 + 76 =
  30. 30.46 + 22 + 68 + 33 =
  31. 31.12 + 12 + 15 + 53 =
  32. 32.42 + 78 + 44 + 83 =
  33. 33.48 + 17 + 14 + 84 =
  34. 34.19 + 19 + 51 + 74 =
  35. 35.50 + 28 + 59 + 57 =
  36. 36.17 + 42 + 43 + 82 =
  37. 37.70 + 53 + 68 + 81 =
  38. 38.37 + 25 + 30 + 49 =
  39. 39.66 + 16 + 55 + 20 =
  40. 40.83 + 78 + 69 + 14 =

Answer key

  1. 205
  2. 125
  3. 219
  4. 149
  5. 182
  6. 234
  7. 235
  8. 220
  9. 197
  10. 266
  11. 270
  12. 215
  13. 190
  14. 261
  15. 235
  16. 108
  17. 185
  18. 230
  19. 173
  20. 212
  21. 166
  22. 180
  23. 211
  24. 166
  25. 171
  26. 250
  27. 157
  28. 294
  29. 177
  30. 169
  31. 92
  32. 247
  33. 163
  34. 163
  35. 194
  36. 184
  37. 272
  38. 141
  39. 157
  40. 244

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