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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 209 · 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. 1.475 − 37 =
  2. 2.416 − 96 =
  3. 3.74 − 67 =
  4. 4.375 − 37 =
  5. 5.581 − 66 =
  6. 6.196 − 67 =
  7. 7.187 − 97 =
  8. 8.140 − 37 =
  9. 9.104 − 18 =
  10. 10.388 − 69 =
  11. 11.351 − 48 =
  12. 12.365 − 67 =
  13. 13.159 − 17 =
  14. 14.118 − 96 =
  15. 15.565 − 99 =
  16. 16.167 − 98 =
  17. 17.545 − 49 =
  18. 18.236 − 96 =
  19. 19.586 − 47 =
  20. 20.374 − 67 =
  21. 21.546 − 78 =
  22. 22.107 − 86 =
  23. 23.305 − 76 =
  24. 24.244 − 99 =
  25. 25.214 − 29 =
  26. 26.514 − 37 =
  27. 27.345 − 77 =
  28. 28.103 − 19 =
  29. 29.580 − 98 =
  30. 30.254 − 46 =
  31. 31.361 − 36 =
  32. 32.380 − 77 =
  33. 33.426 − 27 =
  34. 34.358 − 39 =
  35. 35.535 − 88 =
  36. 36.443 − 76 =
  37. 37.412 − 26 =
  38. 38.557 − 46 =
  39. 39.427 − 49 =
  40. 40.562 − 79 =

Answer key

  1. 438
  2. 320
  3. 7
  4. 338
  5. 515
  6. 129
  7. 90
  8. 103
  9. 86
  10. 319
  11. 303
  12. 298
  13. 142
  14. 22
  15. 466
  16. 69
  17. 496
  18. 140
  19. 539
  20. 307
  21. 468
  22. 21
  23. 229
  24. 145
  25. 185
  26. 477
  27. 268
  28. 84
  29. 482
  30. 208
  31. 325
  32. 303
  33. 399
  34. 319
  35. 447
  36. 367
  37. 386
  38. 511
  39. 378
  40. 483

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