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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 52 · 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. 1.23 + 86 + 17 + 46 =
  2. 2.33 + 33 + 82 + 31 =
  3. 3.79 + 87 + 43 + 70 =
  4. 4.26 + 32 + 75 + 38 =
  5. 5.79 + 80 + 85 + 53 =
  6. 6.56 + 16 + 79 + 80 =
  7. 7.72 + 32 + 17 + 75 =
  8. 8.44 + 69 + 77 + 52 =
  9. 9.26 + 44 + 55 + 77 =
  10. 10.79 + 54 + 36 + 39 =
  11. 11.72 + 86 + 50 + 41 =
  12. 12.80 + 59 + 80 + 33 =
  13. 13.81 + 32 + 12 + 42 =
  14. 14.56 + 44 + 37 + 41 =
  15. 15.45 + 76 + 16 + 44 =
  16. 16.12 + 46 + 39 + 54 =
  17. 17.40 + 26 + 13 + 68 =
  18. 18.67 + 57 + 64 + 66 =
  19. 19.86 + 76 + 47 + 46 =
  20. 20.56 + 89 + 88 + 77 =
  21. 21.31 + 76 + 33 + 25 =
  22. 22.78 + 15 + 28 + 12 =
  23. 23.37 + 43 + 13 + 54 =
  24. 24.31 + 22 + 55 + 41 =
  25. 25.40 + 51 + 19 + 85 =
  26. 26.58 + 25 + 61 + 47 =
  27. 27.52 + 84 + 67 + 60 =
  28. 28.31 + 76 + 70 + 39 =
  29. 29.15 + 40 + 79 + 59 =
  30. 30.19 + 53 + 37 + 42 =
  31. 31.81 + 86 + 13 + 11 =
  32. 32.39 + 86 + 89 + 74 =
  33. 33.39 + 45 + 42 + 14 =
  34. 34.89 + 56 + 22 + 47 =
  35. 35.84 + 33 + 41 + 41 =
  36. 36.42 + 56 + 15 + 66 =
  37. 37.85 + 31 + 82 + 68 =
  38. 38.37 + 19 + 15 + 18 =
  39. 39.58 + 35 + 64 + 25 =
  40. 40.27 + 74 + 44 + 58 =

Answer key

  1. 172
  2. 179
  3. 279
  4. 171
  5. 297
  6. 231
  7. 196
  8. 242
  9. 202
  10. 208
  11. 249
  12. 252
  13. 167
  14. 178
  15. 181
  16. 151
  17. 147
  18. 254
  19. 255
  20. 310
  21. 165
  22. 133
  23. 147
  24. 149
  25. 195
  26. 191
  27. 263
  28. 216
  29. 193
  30. 151
  31. 191
  32. 288
  33. 140
  34. 214
  35. 199
  36. 179
  37. 266
  38. 89
  39. 182
  40. 203

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