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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 599 · 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. 1.55 + 22 + 22 + 52 =
  2. 2.53 + 81 + 71 + 89 =
  3. 3.52 + 68 + 27 + 46 =
  4. 4.31 + 49 + 18 + 25 =
  5. 5.59 + 67 + 55 + 65 =
  6. 6.82 + 82 + 76 + 17 =
  7. 7.79 + 19 + 46 + 85 =
  8. 8.28 + 68 + 80 + 11 =
  9. 9.85 + 73 + 64 + 66 =
  10. 10.79 + 70 + 29 + 67 =
  11. 11.51 + 82 + 29 + 76 =
  12. 12.85 + 32 + 39 + 31 =
  13. 13.37 + 40 + 32 + 71 =
  14. 14.83 + 16 + 57 + 56 =
  15. 15.58 + 68 + 28 + 46 =
  16. 16.22 + 31 + 20 + 62 =
  17. 17.51 + 71 + 52 + 51 =
  18. 18.40 + 51 + 55 + 74 =
  19. 19.26 + 87 + 65 + 54 =
  20. 20.27 + 76 + 37 + 23 =
  21. 21.86 + 78 + 13 + 30 =
  22. 22.45 + 79 + 87 + 45 =
  23. 23.59 + 47 + 20 + 44 =
  24. 24.29 + 84 + 75 + 87 =
  25. 25.21 + 69 + 81 + 67 =
  26. 26.82 + 20 + 89 + 85 =
  27. 27.21 + 12 + 34 + 49 =
  28. 28.49 + 80 + 64 + 83 =
  29. 29.17 + 59 + 62 + 35 =
  30. 30.15 + 15 + 24 + 84 =
  31. 31.18 + 55 + 43 + 59 =
  32. 32.68 + 53 + 85 + 31 =
  33. 33.16 + 42 + 82 + 38 =
  34. 34.68 + 56 + 17 + 53 =
  35. 35.81 + 76 + 36 + 75 =
  36. 36.22 + 39 + 63 + 59 =
  37. 37.20 + 18 + 15 + 84 =
  38. 38.51 + 84 + 80 + 79 =
  39. 39.73 + 79 + 37 + 55 =
  40. 40.22 + 50 + 34 + 65 =

Answer key

  1. 151
  2. 294
  3. 193
  4. 123
  5. 246
  6. 257
  7. 229
  8. 187
  9. 288
  10. 245
  11. 238
  12. 187
  13. 180
  14. 212
  15. 200
  16. 135
  17. 225
  18. 220
  19. 232
  20. 163
  21. 207
  22. 256
  23. 170
  24. 275
  25. 238
  26. 276
  27. 116
  28. 276
  29. 173
  30. 138
  31. 175
  32. 237
  33. 178
  34. 194
  35. 268
  36. 183
  37. 137
  38. 294
  39. 244
  40. 171

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