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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 173 · 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. 1.235 − 59 =
  2. 2.565 − 47 =
  3. 3.162 − 18 =
  4. 4.321 − 76 =
  5. 5.538 − 49 =
  6. 6.187 − 88 =
  7. 7.443 − 59 =
  8. 8.317 − 57 =
  9. 9.444 − 36 =
  10. 10.426 − 69 =
  11. 11.332 − 88 =
  12. 12.227 − 28 =
  13. 13.282 − 76 =
  14. 14.199 − 99 =
  15. 15.376 − 47 =
  16. 16.313 − 69 =
  17. 17.483 − 39 =
  18. 18.374 − 36 =
  19. 19.360 − 29 =
  20. 20.312 − 88 =
  21. 21.234 − 87 =
  22. 22.177 − 26 =
  23. 23.289 − 17 =
  24. 24.261 − 39 =
  25. 25.206 − 37 =
  26. 26.437 − 28 =
  27. 27.98 − 79 =
  28. 28.182 − 96 =
  29. 29.473 − 48 =
  30. 30.371 − 57 =
  31. 31.266 − 87 =
  32. 32.77 − 57 =
  33. 33.190 − 58 =
  34. 34.453 − 28 =
  35. 35.444 − 67 =
  36. 36.189 − 89 =
  37. 37.233 − 86 =
  38. 38.114 − 17 =
  39. 39.518 − 66 =
  40. 40.583 − 19 =

Answer key

  1. 176
  2. 518
  3. 144
  4. 245
  5. 489
  6. 99
  7. 384
  8. 260
  9. 408
  10. 357
  11. 244
  12. 199
  13. 206
  14. 100
  15. 329
  16. 244
  17. 444
  18. 338
  19. 331
  20. 224
  21. 147
  22. 151
  23. 272
  24. 222
  25. 169
  26. 409
  27. 19
  28. 86
  29. 425
  30. 314
  31. 179
  32. 20
  33. 132
  34. 425
  35. 377
  36. 100
  37. 147
  38. 97
  39. 452
  40. 564

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