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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 85 · 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. 1.21 + 14 + 12 + 42 =
  2. 2.19 + 46 + 79 + 17 =
  3. 3.12 + 47 + 74 + 64 =
  4. 4.57 + 37 + 25 + 34 =
  5. 5.42 + 16 + 45 + 80 =
  6. 6.52 + 58 + 41 + 33 =
  7. 7.47 + 22 + 62 + 23 =
  8. 8.64 + 27 + 42 + 79 =
  9. 9.17 + 21 + 79 + 37 =
  10. 10.70 + 64 + 57 + 73 =
  11. 11.53 + 75 + 51 + 16 =
  12. 12.26 + 40 + 68 + 74 =
  13. 13.35 + 70 + 30 + 57 =
  14. 14.53 + 37 + 48 + 16 =
  15. 15.66 + 17 + 41 + 76 =
  16. 16.38 + 36 + 19 + 67 =
  17. 17.88 + 30 + 22 + 42 =
  18. 18.13 + 52 + 28 + 81 =
  19. 19.44 + 14 + 73 + 33 =
  20. 20.77 + 88 + 57 + 32 =
  21. 21.59 + 80 + 83 + 23 =
  22. 22.51 + 25 + 88 + 86 =
  23. 23.38 + 85 + 24 + 46 =
  24. 24.85 + 87 + 38 + 60 =
  25. 25.83 + 86 + 48 + 82 =
  26. 26.66 + 69 + 22 + 30 =
  27. 27.26 + 66 + 43 + 69 =
  28. 28.42 + 74 + 60 + 76 =
  29. 29.88 + 23 + 86 + 43 =
  30. 30.27 + 66 + 67 + 48 =
  31. 31.40 + 65 + 49 + 17 =
  32. 32.12 + 78 + 20 + 85 =
  33. 33.27 + 64 + 87 + 52 =
  34. 34.65 + 18 + 63 + 28 =
  35. 35.31 + 73 + 68 + 23 =
  36. 36.25 + 12 + 28 + 50 =
  37. 37.78 + 57 + 29 + 87 =
  38. 38.48 + 76 + 41 + 32 =
  39. 39.32 + 11 + 60 + 36 =
  40. 40.54 + 86 + 24 + 22 =

Answer key

  1. 89
  2. 161
  3. 197
  4. 153
  5. 183
  6. 184
  7. 154
  8. 212
  9. 154
  10. 264
  11. 195
  12. 208
  13. 192
  14. 154
  15. 200
  16. 160
  17. 182
  18. 174
  19. 164
  20. 254
  21. 245
  22. 250
  23. 193
  24. 270
  25. 299
  26. 187
  27. 204
  28. 252
  29. 240
  30. 208
  31. 171
  32. 195
  33. 230
  34. 174
  35. 195
  36. 115
  37. 251
  38. 197
  39. 139
  40. 186

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