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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 529 · 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. 1.26 + 37 + 49 + 82 =
  2. 2.47 + 79 + 32 + 79 =
  3. 3.81 + 76 + 77 + 24 =
  4. 4.69 + 13 + 27 + 77 =
  5. 5.69 + 53 + 55 + 41 =
  6. 6.64 + 42 + 66 + 49 =
  7. 7.65 + 37 + 66 + 13 =
  8. 8.85 + 31 + 22 + 69 =
  9. 9.64 + 51 + 20 + 68 =
  10. 10.74 + 67 + 59 + 57 =
  11. 11.13 + 33 + 38 + 67 =
  12. 12.27 + 52 + 50 + 39 =
  13. 13.26 + 66 + 66 + 72 =
  14. 14.33 + 60 + 24 + 15 =
  15. 15.59 + 16 + 89 + 85 =
  16. 16.28 + 40 + 15 + 33 =
  17. 17.69 + 16 + 54 + 80 =
  18. 18.12 + 53 + 13 + 39 =
  19. 19.26 + 55 + 82 + 45 =
  20. 20.66 + 57 + 61 + 79 =
  21. 21.61 + 30 + 31 + 80 =
  22. 22.23 + 33 + 28 + 13 =
  23. 23.36 + 25 + 68 + 23 =
  24. 24.37 + 26 + 85 + 48 =
  25. 25.18 + 77 + 64 + 21 =
  26. 26.33 + 70 + 19 + 31 =
  27. 27.31 + 22 + 82 + 24 =
  28. 28.13 + 20 + 82 + 58 =
  29. 29.29 + 32 + 29 + 12 =
  30. 30.60 + 66 + 58 + 25 =
  31. 31.52 + 43 + 32 + 56 =
  32. 32.16 + 59 + 30 + 82 =
  33. 33.59 + 20 + 19 + 19 =
  34. 34.73 + 62 + 16 + 64 =
  35. 35.32 + 34 + 19 + 64 =
  36. 36.72 + 26 + 29 + 83 =
  37. 37.39 + 82 + 18 + 15 =
  38. 38.34 + 18 + 37 + 66 =
  39. 39.24 + 73 + 38 + 25 =
  40. 40.67 + 20 + 13 + 52 =

Answer key

  1. 194
  2. 237
  3. 258
  4. 186
  5. 218
  6. 221
  7. 181
  8. 207
  9. 203
  10. 257
  11. 151
  12. 168
  13. 230
  14. 132
  15. 249
  16. 116
  17. 219
  18. 117
  19. 208
  20. 263
  21. 202
  22. 97
  23. 152
  24. 196
  25. 180
  26. 153
  27. 159
  28. 173
  29. 102
  30. 209
  31. 183
  32. 187
  33. 117
  34. 215
  35. 149
  36. 210
  37. 154
  38. 155
  39. 160
  40. 152

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