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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 548 · 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. 1.19 + 32 + 18 + 15 =
  2. 2.36 + 71 + 17 + 75 =
  3. 3.52 + 15 + 67 + 62 =
  4. 4.60 + 74 + 53 + 17 =
  5. 5.82 + 51 + 44 + 35 =
  6. 6.30 + 11 + 83 + 40 =
  7. 7.66 + 18 + 51 + 29 =
  8. 8.19 + 40 + 58 + 71 =
  9. 9.84 + 48 + 78 + 75 =
  10. 10.63 + 41 + 53 + 72 =
  11. 11.29 + 87 + 74 + 68 =
  12. 12.13 + 25 + 30 + 64 =
  13. 13.40 + 53 + 56 + 72 =
  14. 14.44 + 12 + 22 + 78 =
  15. 15.78 + 53 + 84 + 75 =
  16. 16.83 + 42 + 72 + 81 =
  17. 17.87 + 77 + 16 + 13 =
  18. 18.35 + 62 + 85 + 15 =
  19. 19.33 + 22 + 81 + 11 =
  20. 20.20 + 17 + 34 + 20 =
  21. 21.70 + 15 + 12 + 79 =
  22. 22.61 + 48 + 71 + 55 =
  23. 23.34 + 16 + 35 + 46 =
  24. 24.51 + 32 + 49 + 42 =
  25. 25.86 + 67 + 56 + 41 =
  26. 26.53 + 64 + 58 + 34 =
  27. 27.83 + 82 + 14 + 20 =
  28. 28.26 + 30 + 56 + 52 =
  29. 29.52 + 76 + 81 + 57 =
  30. 30.55 + 64 + 75 + 87 =
  31. 31.40 + 43 + 62 + 19 =
  32. 32.37 + 37 + 47 + 50 =
  33. 33.45 + 87 + 43 + 64 =
  34. 34.69 + 43 + 15 + 66 =
  35. 35.49 + 11 + 35 + 34 =
  36. 36.52 + 37 + 82 + 65 =
  37. 37.17 + 20 + 49 + 34 =
  38. 38.53 + 79 + 65 + 86 =
  39. 39.29 + 29 + 28 + 85 =
  40. 40.84 + 81 + 51 + 39 =

Answer key

  1. 84
  2. 199
  3. 196
  4. 204
  5. 212
  6. 164
  7. 164
  8. 188
  9. 285
  10. 229
  11. 258
  12. 132
  13. 221
  14. 156
  15. 290
  16. 278
  17. 193
  18. 197
  19. 147
  20. 91
  21. 176
  22. 235
  23. 131
  24. 174
  25. 250
  26. 209
  27. 199
  28. 164
  29. 266
  30. 281
  31. 164
  32. 171
  33. 239
  34. 193
  35. 129
  36. 236
  37. 120
  38. 283
  39. 171
  40. 255

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