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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 850 · 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. 1.13 + 32 + 21 + 64 =
  2. 2.14 + 19 + 65 + 73 =
  3. 3.65 + 17 + 16 + 40 =
  4. 4.67 + 83 + 31 + 11 =
  5. 5.32 + 58 + 30 + 56 =
  6. 6.65 + 20 + 80 + 23 =
  7. 7.78 + 57 + 63 + 41 =
  8. 8.46 + 20 + 27 + 76 =
  9. 9.24 + 18 + 15 + 30 =
  10. 10.89 + 87 + 29 + 19 =
  11. 11.44 + 78 + 87 + 25 =
  12. 12.31 + 62 + 12 + 65 =
  13. 13.51 + 33 + 21 + 38 =
  14. 14.25 + 65 + 24 + 24 =
  15. 15.53 + 38 + 26 + 88 =
  16. 16.30 + 82 + 47 + 46 =
  17. 17.26 + 51 + 63 + 83 =
  18. 18.68 + 87 + 44 + 82 =
  19. 19.49 + 12 + 57 + 29 =
  20. 20.11 + 74 + 85 + 82 =
  21. 21.87 + 12 + 80 + 87 =
  22. 22.82 + 16 + 39 + 13 =
  23. 23.28 + 46 + 83 + 82 =
  24. 24.41 + 71 + 32 + 55 =
  25. 25.24 + 29 + 82 + 33 =
  26. 26.21 + 69 + 80 + 49 =
  27. 27.50 + 22 + 13 + 74 =
  28. 28.21 + 28 + 56 + 80 =
  29. 29.76 + 29 + 45 + 14 =
  30. 30.28 + 26 + 60 + 34 =
  31. 31.58 + 51 + 46 + 49 =
  32. 32.74 + 24 + 69 + 58 =
  33. 33.11 + 23 + 42 + 15 =
  34. 34.79 + 69 + 24 + 54 =
  35. 35.72 + 77 + 62 + 49 =
  36. 36.50 + 15 + 12 + 25 =
  37. 37.66 + 72 + 29 + 79 =
  38. 38.62 + 40 + 20 + 56 =
  39. 39.82 + 77 + 41 + 25 =
  40. 40.25 + 27 + 13 + 89 =

Answer key

  1. 130
  2. 171
  3. 138
  4. 192
  5. 176
  6. 188
  7. 239
  8. 169
  9. 87
  10. 224
  11. 234
  12. 170
  13. 143
  14. 138
  15. 205
  16. 205
  17. 223
  18. 281
  19. 147
  20. 252
  21. 266
  22. 150
  23. 239
  24. 199
  25. 168
  26. 219
  27. 159
  28. 185
  29. 164
  30. 148
  31. 204
  32. 225
  33. 91
  34. 226
  35. 260
  36. 102
  37. 246
  38. 178
  39. 225
  40. 154

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