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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 447 · 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. 1.63 + 15 + 68 + 84 =
  2. 2.84 + 42 + 16 + 82 =
  3. 3.78 + 14 + 33 + 73 =
  4. 4.85 + 75 + 13 + 25 =
  5. 5.50 + 59 + 51 + 80 =
  6. 6.33 + 82 + 66 + 40 =
  7. 7.84 + 27 + 76 + 77 =
  8. 8.22 + 34 + 49 + 24 =
  9. 9.11 + 74 + 77 + 62 =
  10. 10.33 + 66 + 82 + 40 =
  11. 11.56 + 74 + 22 + 32 =
  12. 12.15 + 66 + 75 + 85 =
  13. 13.82 + 11 + 30 + 50 =
  14. 14.24 + 27 + 46 + 49 =
  15. 15.34 + 76 + 89 + 31 =
  16. 16.67 + 78 + 58 + 29 =
  17. 17.18 + 69 + 86 + 27 =
  18. 18.53 + 24 + 32 + 36 =
  19. 19.71 + 62 + 21 + 25 =
  20. 20.59 + 42 + 82 + 21 =
  21. 21.12 + 85 + 20 + 44 =
  22. 22.12 + 27 + 54 + 50 =
  23. 23.84 + 12 + 41 + 64 =
  24. 24.23 + 55 + 86 + 71 =
  25. 25.54 + 61 + 89 + 67 =
  26. 26.65 + 28 + 27 + 28 =
  27. 27.25 + 70 + 40 + 87 =
  28. 28.79 + 34 + 76 + 31 =
  29. 29.19 + 43 + 70 + 45 =
  30. 30.14 + 84 + 65 + 14 =
  31. 31.81 + 62 + 65 + 70 =
  32. 32.27 + 24 + 51 + 62 =
  33. 33.50 + 75 + 28 + 28 =
  34. 34.83 + 43 + 15 + 49 =
  35. 35.78 + 11 + 64 + 65 =
  36. 36.14 + 63 + 33 + 79 =
  37. 37.51 + 82 + 38 + 45 =
  38. 38.50 + 49 + 30 + 49 =
  39. 39.53 + 23 + 35 + 19 =
  40. 40.46 + 40 + 83 + 76 =

Answer key

  1. 230
  2. 224
  3. 198
  4. 198
  5. 240
  6. 221
  7. 264
  8. 129
  9. 224
  10. 221
  11. 184
  12. 241
  13. 173
  14. 146
  15. 230
  16. 232
  17. 200
  18. 145
  19. 179
  20. 204
  21. 161
  22. 143
  23. 201
  24. 235
  25. 271
  26. 148
  27. 222
  28. 220
  29. 177
  30. 177
  31. 278
  32. 164
  33. 181
  34. 190
  35. 218
  36. 189
  37. 216
  38. 178
  39. 130
  40. 245

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