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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 474 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.277 − 27 =
  2. 2.492 − 86 =
  3. 3.165 − 16 =
  4. 4.513 − 47 =
  5. 5.180 − 29 =
  6. 6.276 − 29 =
  7. 7.255 − 17 =
  8. 8.366 − 47 =
  9. 9.195 − 48 =
  10. 10.467 − 19 =
  11. 11.299 − 68 =
  12. 12.261 − 38 =
  13. 13.383 − 98 =
  14. 14.69 − 67 =
  15. 15.240 − 89 =
  16. 16.112 − 67 =
  17. 17.385 − 97 =
  18. 18.533 − 69 =
  19. 19.182 − 26 =
  20. 20.258 − 27 =
  21. 21.163 − 96 =
  22. 22.110 − 56 =
  23. 23.232 − 87 =
  24. 24.85 − 77 =
  25. 25.562 − 89 =
  26. 26.141 − 66 =
  27. 27.166 − 38 =
  28. 28.204 − 59 =
  29. 29.228 − 17 =
  30. 30.435 − 96 =
  31. 31.344 − 69 =
  32. 32.73 − 48 =
  33. 33.85 − 66 =
  34. 34.508 − 37 =
  35. 35.374 − 76 =
  36. 36.519 − 98 =
  37. 37.123 − 96 =
  38. 38.179 − 99 =
  39. 39.143 − 27 =
  40. 40.386 − 56 =

Answer key

  1. 250
  2. 406
  3. 149
  4. 466
  5. 151
  6. 247
  7. 238
  8. 319
  9. 147
  10. 448
  11. 231
  12. 223
  13. 285
  14. 2
  15. 151
  16. 45
  17. 288
  18. 464
  19. 156
  20. 231
  21. 67
  22. 54
  23. 145
  24. 8
  25. 473
  26. 75
  27. 128
  28. 145
  29. 211
  30. 339
  31. 275
  32. 25
  33. 19
  34. 471
  35. 298
  36. 421
  37. 27
  38. 80
  39. 116
  40. 330

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