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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 180 · 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. 1.31 + 13 + 23 + 17 =
  2. 2.62 + 14 + 22 + 14 =
  3. 3.86 + 22 + 44 + 61 =
  4. 4.41 + 73 + 81 + 70 =
  5. 5.47 + 58 + 83 + 82 =
  6. 6.43 + 75 + 24 + 23 =
  7. 7.45 + 75 + 20 + 44 =
  8. 8.52 + 15 + 33 + 45 =
  9. 9.11 + 60 + 20 + 42 =
  10. 10.56 + 72 + 28 + 11 =
  11. 11.80 + 84 + 39 + 81 =
  12. 12.74 + 77 + 35 + 58 =
  13. 13.85 + 49 + 64 + 18 =
  14. 14.34 + 25 + 33 + 30 =
  15. 15.43 + 45 + 88 + 45 =
  16. 16.87 + 63 + 82 + 41 =
  17. 17.79 + 18 + 30 + 57 =
  18. 18.80 + 17 + 56 + 79 =
  19. 19.54 + 67 + 23 + 44 =
  20. 20.31 + 38 + 24 + 50 =
  21. 21.37 + 67 + 25 + 26 =
  22. 22.36 + 30 + 22 + 48 =
  23. 23.72 + 52 + 62 + 15 =
  24. 24.45 + 47 + 84 + 34 =
  25. 25.55 + 14 + 62 + 79 =
  26. 26.15 + 87 + 89 + 77 =
  27. 27.73 + 23 + 51 + 78 =
  28. 28.21 + 15 + 43 + 60 =
  29. 29.16 + 35 + 24 + 40 =
  30. 30.17 + 47 + 41 + 17 =
  31. 31.75 + 78 + 28 + 35 =
  32. 32.67 + 43 + 18 + 26 =
  33. 33.18 + 21 + 16 + 26 =
  34. 34.42 + 83 + 60 + 62 =
  35. 35.33 + 54 + 12 + 29 =
  36. 36.41 + 60 + 54 + 11 =
  37. 37.11 + 33 + 48 + 16 =
  38. 38.27 + 83 + 29 + 85 =
  39. 39.16 + 57 + 62 + 65 =
  40. 40.38 + 76 + 31 + 59 =

Answer key

  1. 84
  2. 112
  3. 213
  4. 265
  5. 270
  6. 165
  7. 184
  8. 145
  9. 133
  10. 167
  11. 284
  12. 244
  13. 216
  14. 122
  15. 221
  16. 273
  17. 184
  18. 232
  19. 188
  20. 143
  21. 155
  22. 136
  23. 201
  24. 210
  25. 210
  26. 268
  27. 225
  28. 139
  29. 115
  30. 122
  31. 216
  32. 154
  33. 81
  34. 247
  35. 128
  36. 166
  37. 108
  38. 224
  39. 200
  40. 204

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