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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 768 · 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. 1.52 + 70 + 81 + 76 =
  2. 2.66 + 56 + 38 + 20 =
  3. 3.57 + 64 + 45 + 55 =
  4. 4.43 + 52 + 27 + 55 =
  5. 5.39 + 31 + 20 + 79 =
  6. 6.75 + 76 + 30 + 18 =
  7. 7.37 + 38 + 59 + 21 =
  8. 8.47 + 38 + 78 + 61 =
  9. 9.12 + 76 + 37 + 78 =
  10. 10.28 + 58 + 55 + 20 =
  11. 11.38 + 47 + 46 + 18 =
  12. 12.34 + 87 + 24 + 73 =
  13. 13.54 + 11 + 55 + 18 =
  14. 14.89 + 28 + 82 + 25 =
  15. 15.18 + 11 + 24 + 13 =
  16. 16.33 + 55 + 36 + 21 =
  17. 17.82 + 80 + 59 + 19 =
  18. 18.66 + 29 + 14 + 29 =
  19. 19.37 + 26 + 67 + 75 =
  20. 20.60 + 74 + 68 + 52 =
  21. 21.43 + 86 + 59 + 64 =
  22. 22.81 + 31 + 31 + 77 =
  23. 23.55 + 24 + 51 + 31 =
  24. 24.53 + 44 + 50 + 78 =
  25. 25.20 + 23 + 30 + 62 =
  26. 26.30 + 82 + 26 + 51 =
  27. 27.35 + 62 + 33 + 33 =
  28. 28.27 + 42 + 39 + 52 =
  29. 29.38 + 78 + 50 + 36 =
  30. 30.12 + 13 + 40 + 62 =
  31. 31.75 + 81 + 28 + 63 =
  32. 32.23 + 45 + 23 + 27 =
  33. 33.34 + 61 + 51 + 21 =
  34. 34.73 + 73 + 20 + 15 =
  35. 35.30 + 19 + 61 + 31 =
  36. 36.61 + 65 + 23 + 77 =
  37. 37.17 + 25 + 26 + 82 =
  38. 38.31 + 73 + 13 + 23 =
  39. 39.49 + 87 + 68 + 68 =
  40. 40.64 + 25 + 24 + 36 =

Answer key

  1. 279
  2. 180
  3. 221
  4. 177
  5. 169
  6. 199
  7. 155
  8. 224
  9. 203
  10. 161
  11. 149
  12. 218
  13. 138
  14. 224
  15. 66
  16. 145
  17. 240
  18. 138
  19. 205
  20. 254
  21. 252
  22. 220
  23. 161
  24. 225
  25. 135
  26. 189
  27. 163
  28. 160
  29. 202
  30. 127
  31. 247
  32. 118
  33. 167
  34. 181
  35. 141
  36. 226
  37. 150
  38. 140
  39. 272
  40. 149

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