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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 28 · 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. 1.18 + 54 + 47 + 25 =
  2. 2.84 + 66 + 80 + 76 =
  3. 3.71 + 23 + 18 + 87 =
  4. 4.11 + 72 + 43 + 19 =
  5. 5.12 + 44 + 11 + 87 =
  6. 6.30 + 60 + 27 + 71 =
  7. 7.31 + 69 + 49 + 17 =
  8. 8.79 + 58 + 38 + 72 =
  9. 9.30 + 25 + 44 + 20 =
  10. 10.16 + 31 + 63 + 40 =
  11. 11.33 + 22 + 14 + 65 =
  12. 12.32 + 85 + 30 + 17 =
  13. 13.37 + 19 + 37 + 83 =
  14. 14.53 + 40 + 53 + 35 =
  15. 15.88 + 72 + 21 + 17 =
  16. 16.57 + 48 + 24 + 71 =
  17. 17.21 + 40 + 43 + 27 =
  18. 18.53 + 16 + 78 + 12 =
  19. 19.31 + 58 + 81 + 41 =
  20. 20.80 + 53 + 65 + 31 =
  21. 21.38 + 11 + 53 + 26 =
  22. 22.75 + 31 + 11 + 33 =
  23. 23.56 + 13 + 80 + 33 =
  24. 24.15 + 84 + 33 + 39 =
  25. 25.87 + 24 + 80 + 78 =
  26. 26.50 + 47 + 36 + 57 =
  27. 27.37 + 86 + 18 + 30 =
  28. 28.37 + 45 + 77 + 19 =
  29. 29.68 + 72 + 47 + 24 =
  30. 30.49 + 80 + 24 + 66 =
  31. 31.23 + 88 + 25 + 22 =
  32. 32.44 + 57 + 58 + 83 =
  33. 33.18 + 84 + 46 + 40 =
  34. 34.56 + 26 + 87 + 33 =
  35. 35.76 + 65 + 64 + 41 =
  36. 36.15 + 87 + 86 + 57 =
  37. 37.34 + 15 + 15 + 55 =
  38. 38.66 + 49 + 68 + 71 =
  39. 39.15 + 49 + 16 + 31 =
  40. 40.25 + 56 + 76 + 77 =

Answer key

  1. 144
  2. 306
  3. 199
  4. 145
  5. 154
  6. 188
  7. 166
  8. 247
  9. 119
  10. 150
  11. 134
  12. 164
  13. 176
  14. 181
  15. 198
  16. 200
  17. 131
  18. 159
  19. 211
  20. 229
  21. 128
  22. 150
  23. 182
  24. 171
  25. 269
  26. 190
  27. 171
  28. 178
  29. 211
  30. 219
  31. 158
  32. 242
  33. 188
  34. 202
  35. 246
  36. 245
  37. 119
  38. 254
  39. 111
  40. 234

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