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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 401 · 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. 1.23 + 45 + 24 + 80 =
  2. 2.53 + 72 + 53 + 15 =
  3. 3.74 + 29 + 60 + 33 =
  4. 4.22 + 80 + 26 + 89 =
  5. 5.61 + 52 + 14 + 75 =
  6. 6.34 + 34 + 55 + 28 =
  7. 7.31 + 53 + 45 + 26 =
  8. 8.60 + 31 + 83 + 28 =
  9. 9.35 + 14 + 74 + 64 =
  10. 10.28 + 57 + 19 + 28 =
  11. 11.30 + 82 + 50 + 21 =
  12. 12.39 + 82 + 85 + 83 =
  13. 13.27 + 40 + 14 + 86 =
  14. 14.73 + 65 + 81 + 30 =
  15. 15.12 + 20 + 70 + 14 =
  16. 16.25 + 70 + 54 + 29 =
  17. 17.54 + 42 + 89 + 53 =
  18. 18.58 + 16 + 79 + 27 =
  19. 19.54 + 34 + 15 + 17 =
  20. 20.82 + 67 + 73 + 71 =
  21. 21.11 + 37 + 81 + 23 =
  22. 22.88 + 76 + 75 + 45 =
  23. 23.77 + 79 + 29 + 66 =
  24. 24.63 + 51 + 46 + 77 =
  25. 25.72 + 84 + 31 + 63 =
  26. 26.66 + 28 + 78 + 64 =
  27. 27.49 + 23 + 28 + 67 =
  28. 28.53 + 81 + 31 + 37 =
  29. 29.87 + 70 + 86 + 63 =
  30. 30.28 + 60 + 33 + 76 =
  31. 31.17 + 17 + 63 + 49 =
  32. 32.42 + 33 + 30 + 66 =
  33. 33.76 + 87 + 84 + 33 =
  34. 34.53 + 52 + 36 + 42 =
  35. 35.87 + 67 + 86 + 14 =
  36. 36.45 + 13 + 52 + 75 =
  37. 37.68 + 63 + 18 + 18 =
  38. 38.59 + 68 + 11 + 16 =
  39. 39.13 + 63 + 40 + 30 =
  40. 40.26 + 37 + 47 + 31 =

Answer key

  1. 172
  2. 193
  3. 196
  4. 217
  5. 202
  6. 151
  7. 155
  8. 202
  9. 187
  10. 132
  11. 183
  12. 289
  13. 167
  14. 249
  15. 116
  16. 178
  17. 238
  18. 180
  19. 120
  20. 293
  21. 152
  22. 284
  23. 251
  24. 237
  25. 250
  26. 236
  27. 167
  28. 202
  29. 306
  30. 197
  31. 146
  32. 171
  33. 280
  34. 183
  35. 254
  36. 185
  37. 167
  38. 154
  39. 146
  40. 141

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