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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 409 · 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. 1.34 + 16 + 35 + 30 =
  2. 2.79 + 56 + 17 + 18 =
  3. 3.44 + 86 + 49 + 48 =
  4. 4.13 + 64 + 24 + 59 =
  5. 5.89 + 53 + 25 + 13 =
  6. 6.25 + 81 + 84 + 64 =
  7. 7.88 + 40 + 42 + 18 =
  8. 8.16 + 40 + 64 + 87 =
  9. 9.69 + 23 + 81 + 66 =
  10. 10.74 + 41 + 15 + 35 =
  11. 11.52 + 60 + 41 + 38 =
  12. 12.13 + 36 + 37 + 26 =
  13. 13.45 + 21 + 53 + 44 =
  14. 14.74 + 17 + 76 + 32 =
  15. 15.41 + 32 + 82 + 51 =
  16. 16.53 + 65 + 53 + 78 =
  17. 17.56 + 28 + 14 + 44 =
  18. 18.42 + 19 + 12 + 27 =
  19. 19.89 + 18 + 23 + 49 =
  20. 20.81 + 69 + 23 + 19 =
  21. 21.40 + 75 + 18 + 37 =
  22. 22.26 + 54 + 17 + 13 =
  23. 23.62 + 22 + 74 + 47 =
  24. 24.85 + 33 + 60 + 33 =
  25. 25.31 + 15 + 56 + 52 =
  26. 26.78 + 78 + 28 + 24 =
  27. 27.49 + 30 + 16 + 37 =
  28. 28.29 + 22 + 19 + 23 =
  29. 29.29 + 52 + 67 + 70 =
  30. 30.25 + 79 + 83 + 84 =
  31. 31.48 + 24 + 49 + 26 =
  32. 32.36 + 19 + 49 + 22 =
  33. 33.37 + 24 + 35 + 19 =
  34. 34.32 + 14 + 65 + 27 =
  35. 35.66 + 17 + 40 + 29 =
  36. 36.28 + 70 + 23 + 62 =
  37. 37.34 + 60 + 32 + 50 =
  38. 38.65 + 67 + 51 + 35 =
  39. 39.71 + 35 + 13 + 42 =
  40. 40.27 + 81 + 11 + 34 =

Answer key

  1. 115
  2. 170
  3. 227
  4. 160
  5. 180
  6. 254
  7. 188
  8. 207
  9. 239
  10. 165
  11. 191
  12. 112
  13. 163
  14. 199
  15. 206
  16. 249
  17. 142
  18. 100
  19. 179
  20. 192
  21. 170
  22. 110
  23. 205
  24. 211
  25. 154
  26. 208
  27. 132
  28. 93
  29. 218
  30. 271
  31. 147
  32. 126
  33. 115
  34. 138
  35. 152
  36. 183
  37. 176
  38. 218
  39. 161
  40. 153

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