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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 586 · 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. 1.78 + 54 + 84 + 54 =
  2. 2.44 + 83 + 46 + 14 =
  3. 3.49 + 59 + 30 + 31 =
  4. 4.21 + 70 + 81 + 71 =
  5. 5.14 + 17 + 82 + 86 =
  6. 6.88 + 50 + 20 + 15 =
  7. 7.56 + 41 + 12 + 68 =
  8. 8.11 + 12 + 41 + 18 =
  9. 9.15 + 23 + 45 + 57 =
  10. 10.85 + 25 + 22 + 75 =
  11. 11.84 + 27 + 67 + 87 =
  12. 12.75 + 30 + 85 + 28 =
  13. 13.81 + 31 + 19 + 44 =
  14. 14.54 + 27 + 45 + 60 =
  15. 15.27 + 53 + 32 + 23 =
  16. 16.62 + 42 + 28 + 37 =
  17. 17.12 + 26 + 61 + 22 =
  18. 18.29 + 31 + 42 + 39 =
  19. 19.89 + 36 + 31 + 30 =
  20. 20.33 + 37 + 59 + 82 =
  21. 21.81 + 55 + 74 + 17 =
  22. 22.82 + 45 + 30 + 33 =
  23. 23.30 + 15 + 78 + 55 =
  24. 24.30 + 74 + 89 + 64 =
  25. 25.65 + 30 + 30 + 87 =
  26. 26.79 + 79 + 13 + 42 =
  27. 27.79 + 42 + 74 + 23 =
  28. 28.71 + 20 + 81 + 62 =
  29. 29.82 + 87 + 63 + 50 =
  30. 30.23 + 21 + 82 + 74 =
  31. 31.75 + 89 + 68 + 14 =
  32. 32.57 + 29 + 76 + 65 =
  33. 33.30 + 55 + 26 + 64 =
  34. 34.12 + 49 + 18 + 60 =
  35. 35.31 + 49 + 78 + 25 =
  36. 36.68 + 87 + 29 + 75 =
  37. 37.68 + 14 + 74 + 64 =
  38. 38.77 + 89 + 11 + 79 =
  39. 39.34 + 65 + 85 + 58 =
  40. 40.80 + 57 + 37 + 29 =

Answer key

  1. 270
  2. 187
  3. 169
  4. 243
  5. 199
  6. 173
  7. 177
  8. 82
  9. 140
  10. 207
  11. 265
  12. 218
  13. 175
  14. 186
  15. 135
  16. 169
  17. 121
  18. 141
  19. 186
  20. 211
  21. 227
  22. 190
  23. 178
  24. 257
  25. 212
  26. 213
  27. 218
  28. 234
  29. 282
  30. 200
  31. 246
  32. 227
  33. 175
  34. 139
  35. 183
  36. 259
  37. 220
  38. 256
  39. 242
  40. 203

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