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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 393 · 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. 1.36 + 50 + 83 + 58 =
  2. 2.59 + 27 + 43 + 15 =
  3. 3.83 + 66 + 70 + 53 =
  4. 4.23 + 53 + 47 + 40 =
  5. 5.12 + 37 + 52 + 50 =
  6. 6.23 + 43 + 38 + 81 =
  7. 7.31 + 83 + 68 + 89 =
  8. 8.20 + 74 + 43 + 48 =
  9. 9.84 + 28 + 60 + 66 =
  10. 10.29 + 80 + 60 + 39 =
  11. 11.22 + 31 + 53 + 72 =
  12. 12.24 + 29 + 83 + 30 =
  13. 13.44 + 70 + 45 + 79 =
  14. 14.33 + 19 + 29 + 11 =
  15. 15.19 + 70 + 30 + 13 =
  16. 16.26 + 12 + 89 + 33 =
  17. 17.47 + 82 + 64 + 62 =
  18. 18.49 + 14 + 32 + 22 =
  19. 19.37 + 56 + 13 + 49 =
  20. 20.25 + 23 + 22 + 46 =
  21. 21.55 + 20 + 38 + 33 =
  22. 22.71 + 40 + 22 + 20 =
  23. 23.21 + 63 + 57 + 52 =
  24. 24.56 + 60 + 76 + 15 =
  25. 25.44 + 84 + 25 + 26 =
  26. 26.28 + 63 + 53 + 51 =
  27. 27.37 + 87 + 89 + 20 =
  28. 28.40 + 68 + 11 + 58 =
  29. 29.80 + 81 + 40 + 57 =
  30. 30.38 + 86 + 71 + 52 =
  31. 31.88 + 71 + 33 + 67 =
  32. 32.37 + 50 + 40 + 88 =
  33. 33.71 + 19 + 13 + 82 =
  34. 34.55 + 38 + 28 + 70 =
  35. 35.44 + 72 + 54 + 61 =
  36. 36.12 + 22 + 88 + 59 =
  37. 37.71 + 16 + 39 + 48 =
  38. 38.58 + 63 + 12 + 66 =
  39. 39.12 + 56 + 19 + 66 =
  40. 40.51 + 45 + 76 + 17 =

Answer key

  1. 227
  2. 144
  3. 272
  4. 163
  5. 151
  6. 185
  7. 271
  8. 185
  9. 238
  10. 208
  11. 178
  12. 166
  13. 238
  14. 92
  15. 132
  16. 160
  17. 255
  18. 117
  19. 155
  20. 116
  21. 146
  22. 153
  23. 193
  24. 207
  25. 179
  26. 195
  27. 233
  28. 177
  29. 258
  30. 247
  31. 259
  32. 215
  33. 185
  34. 191
  35. 231
  36. 181
  37. 174
  38. 199
  39. 153
  40. 189

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