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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 531 · 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. 1.84 + 80 + 40 + 65 =
  2. 2.41 + 40 + 47 + 72 =
  3. 3.52 + 41 + 18 + 12 =
  4. 4.22 + 77 + 57 + 17 =
  5. 5.58 + 47 + 21 + 63 =
  6. 6.28 + 18 + 15 + 60 =
  7. 7.88 + 36 + 24 + 28 =
  8. 8.28 + 50 + 86 + 59 =
  9. 9.21 + 22 + 64 + 47 =
  10. 10.27 + 67 + 58 + 28 =
  11. 11.46 + 73 + 48 + 28 =
  12. 12.88 + 35 + 19 + 13 =
  13. 13.19 + 55 + 74 + 84 =
  14. 14.65 + 21 + 67 + 43 =
  15. 15.59 + 73 + 28 + 67 =
  16. 16.22 + 29 + 85 + 60 =
  17. 17.27 + 74 + 11 + 40 =
  18. 18.24 + 37 + 20 + 13 =
  19. 19.84 + 71 + 64 + 62 =
  20. 20.83 + 83 + 50 + 59 =
  21. 21.71 + 16 + 27 + 30 =
  22. 22.12 + 40 + 21 + 15 =
  23. 23.27 + 87 + 74 + 78 =
  24. 24.72 + 21 + 47 + 57 =
  25. 25.71 + 16 + 64 + 60 =
  26. 26.82 + 17 + 62 + 69 =
  27. 27.63 + 20 + 11 + 54 =
  28. 28.39 + 24 + 78 + 14 =
  29. 29.80 + 33 + 88 + 72 =
  30. 30.85 + 50 + 47 + 20 =
  31. 31.49 + 13 + 31 + 80 =
  32. 32.72 + 21 + 68 + 77 =
  33. 33.41 + 46 + 15 + 53 =
  34. 34.27 + 49 + 11 + 11 =
  35. 35.45 + 83 + 27 + 18 =
  36. 36.56 + 74 + 57 + 48 =
  37. 37.46 + 85 + 14 + 44 =
  38. 38.89 + 76 + 48 + 18 =
  39. 39.60 + 31 + 25 + 81 =
  40. 40.87 + 59 + 50 + 21 =

Answer key

  1. 269
  2. 200
  3. 123
  4. 173
  5. 189
  6. 121
  7. 176
  8. 223
  9. 154
  10. 180
  11. 195
  12. 155
  13. 232
  14. 196
  15. 227
  16. 196
  17. 152
  18. 94
  19. 281
  20. 275
  21. 144
  22. 88
  23. 266
  24. 197
  25. 211
  26. 230
  27. 148
  28. 155
  29. 273
  30. 202
  31. 173
  32. 238
  33. 155
  34. 98
  35. 173
  36. 235
  37. 189
  38. 231
  39. 197
  40. 217

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