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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 4 · 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. 1.70 + 17 + 32 + 40 =
  2. 2.49 + 74 + 40 + 24 =
  3. 3.21 + 57 + 26 + 21 =
  4. 4.17 + 49 + 23 + 40 =
  5. 5.22 + 57 + 38 + 37 =
  6. 6.66 + 88 + 27 + 69 =
  7. 7.42 + 66 + 17 + 87 =
  8. 8.11 + 67 + 20 + 40 =
  9. 9.89 + 55 + 25 + 37 =
  10. 10.18 + 35 + 35 + 77 =
  11. 11.64 + 67 + 11 + 36 =
  12. 12.78 + 24 + 20 + 51 =
  13. 13.70 + 72 + 15 + 47 =
  14. 14.19 + 77 + 24 + 57 =
  15. 15.57 + 34 + 82 + 56 =
  16. 16.13 + 72 + 28 + 26 =
  17. 17.88 + 40 + 59 + 42 =
  18. 18.89 + 26 + 17 + 29 =
  19. 19.56 + 23 + 28 + 22 =
  20. 20.32 + 18 + 60 + 11 =
  21. 21.55 + 83 + 33 + 46 =
  22. 22.48 + 85 + 17 + 58 =
  23. 23.82 + 74 + 15 + 31 =
  24. 24.88 + 28 + 17 + 83 =
  25. 25.47 + 34 + 26 + 25 =
  26. 26.27 + 25 + 30 + 33 =
  27. 27.50 + 82 + 39 + 59 =
  28. 28.57 + 14 + 33 + 76 =
  29. 29.14 + 83 + 46 + 11 =
  30. 30.30 + 88 + 20 + 63 =
  31. 31.13 + 49 + 18 + 58 =
  32. 32.81 + 12 + 83 + 12 =
  33. 33.27 + 30 + 32 + 52 =
  34. 34.47 + 61 + 69 + 83 =
  35. 35.20 + 44 + 64 + 65 =
  36. 36.50 + 73 + 40 + 40 =
  37. 37.87 + 20 + 26 + 78 =
  38. 38.79 + 27 + 68 + 70 =
  39. 39.46 + 41 + 88 + 85 =
  40. 40.64 + 86 + 77 + 71 =

Answer key

  1. 159
  2. 187
  3. 125
  4. 129
  5. 154
  6. 250
  7. 212
  8. 138
  9. 206
  10. 165
  11. 178
  12. 173
  13. 204
  14. 177
  15. 229
  16. 139
  17. 229
  18. 161
  19. 129
  20. 121
  21. 217
  22. 208
  23. 202
  24. 216
  25. 132
  26. 115
  27. 230
  28. 180
  29. 154
  30. 201
  31. 138
  32. 188
  33. 141
  34. 260
  35. 193
  36. 203
  37. 211
  38. 244
  39. 260
  40. 298

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