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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 486 · 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 + 62 + 11 + 11 =
  2. 2.49 + 58 + 69 + 12 =
  3. 3.21 + 88 + 86 + 21 =
  4. 4.29 + 74 + 62 + 13 =
  5. 5.32 + 28 + 49 + 87 =
  6. 6.69 + 88 + 26 + 20 =
  7. 7.61 + 64 + 73 + 29 =
  8. 8.33 + 11 + 49 + 17 =
  9. 9.36 + 23 + 20 + 87 =
  10. 10.25 + 40 + 85 + 12 =
  11. 11.78 + 25 + 71 + 31 =
  12. 12.29 + 20 + 32 + 32 =
  13. 13.31 + 26 + 25 + 84 =
  14. 14.13 + 89 + 21 + 65 =
  15. 15.30 + 52 + 30 + 80 =
  16. 16.78 + 44 + 32 + 89 =
  17. 17.30 + 18 + 77 + 75 =
  18. 18.17 + 46 + 14 + 65 =
  19. 19.83 + 88 + 87 + 53 =
  20. 20.15 + 32 + 68 + 78 =
  21. 21.39 + 43 + 41 + 11 =
  22. 22.35 + 46 + 85 + 29 =
  23. 23.25 + 45 + 21 + 37 =
  24. 24.89 + 55 + 17 + 78 =
  25. 25.22 + 44 + 79 + 78 =
  26. 26.82 + 60 + 52 + 82 =
  27. 27.82 + 82 + 86 + 68 =
  28. 28.12 + 41 + 52 + 35 =
  29. 29.18 + 84 + 24 + 72 =
  30. 30.15 + 67 + 17 + 86 =
  31. 31.61 + 87 + 33 + 55 =
  32. 32.58 + 46 + 83 + 24 =
  33. 33.81 + 43 + 89 + 61 =
  34. 34.43 + 13 + 89 + 22 =
  35. 35.64 + 58 + 25 + 45 =
  36. 36.66 + 65 + 25 + 48 =
  37. 37.35 + 30 + 42 + 14 =
  38. 38.61 + 55 + 23 + 19 =
  39. 39.62 + 22 + 75 + 21 =
  40. 40.54 + 32 + 22 + 31 =

Answer key

  1. 115
  2. 188
  3. 216
  4. 178
  5. 196
  6. 203
  7. 227
  8. 110
  9. 166
  10. 162
  11. 205
  12. 113
  13. 166
  14. 188
  15. 192
  16. 243
  17. 200
  18. 142
  19. 311
  20. 193
  21. 134
  22. 195
  23. 128
  24. 239
  25. 223
  26. 276
  27. 318
  28. 140
  29. 198
  30. 185
  31. 236
  32. 211
  33. 274
  34. 167
  35. 192
  36. 204
  37. 121
  38. 158
  39. 180
  40. 139

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