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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 729 · 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. 1.74 + 68 + 39 + 81 =
  2. 2.80 + 84 + 75 + 35 =
  3. 3.75 + 11 + 31 + 83 =
  4. 4.21 + 83 + 26 + 12 =
  5. 5.78 + 38 + 78 + 65 =
  6. 6.79 + 75 + 68 + 22 =
  7. 7.46 + 36 + 82 + 63 =
  8. 8.84 + 62 + 20 + 89 =
  9. 9.49 + 50 + 51 + 61 =
  10. 10.86 + 20 + 57 + 22 =
  11. 11.42 + 22 + 13 + 87 =
  12. 12.26 + 46 + 64 + 47 =
  13. 13.55 + 79 + 36 + 49 =
  14. 14.59 + 83 + 87 + 12 =
  15. 15.27 + 29 + 49 + 57 =
  16. 16.80 + 71 + 48 + 55 =
  17. 17.75 + 64 + 77 + 43 =
  18. 18.36 + 27 + 25 + 40 =
  19. 19.50 + 73 + 64 + 11 =
  20. 20.19 + 83 + 63 + 32 =
  21. 21.29 + 51 + 26 + 43 =
  22. 22.83 + 80 + 43 + 26 =
  23. 23.81 + 78 + 32 + 61 =
  24. 24.34 + 73 + 68 + 83 =
  25. 25.25 + 59 + 88 + 52 =
  26. 26.17 + 28 + 42 + 37 =
  27. 27.42 + 13 + 49 + 56 =
  28. 28.48 + 75 + 80 + 56 =
  29. 29.54 + 79 + 65 + 52 =
  30. 30.78 + 37 + 84 + 19 =
  31. 31.42 + 20 + 49 + 21 =
  32. 32.54 + 65 + 22 + 84 =
  33. 33.12 + 50 + 33 + 59 =
  34. 34.66 + 27 + 31 + 89 =
  35. 35.21 + 26 + 32 + 87 =
  36. 36.78 + 69 + 87 + 86 =
  37. 37.47 + 41 + 43 + 58 =
  38. 38.47 + 14 + 60 + 11 =
  39. 39.29 + 35 + 63 + 74 =
  40. 40.63 + 34 + 47 + 72 =

Answer key

  1. 262
  2. 274
  3. 200
  4. 142
  5. 259
  6. 244
  7. 227
  8. 255
  9. 211
  10. 185
  11. 164
  12. 183
  13. 219
  14. 241
  15. 162
  16. 254
  17. 259
  18. 128
  19. 198
  20. 197
  21. 149
  22. 232
  23. 252
  24. 258
  25. 224
  26. 124
  27. 160
  28. 259
  29. 250
  30. 218
  31. 132
  32. 225
  33. 154
  34. 213
  35. 166
  36. 320
  37. 189
  38. 132
  39. 201
  40. 216

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