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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 349 · 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. 1.549 − 59 =
  2. 2.457 − 87 =
  3. 3.580 − 27 =
  4. 4.149 − 18 =
  5. 5.222 − 17 =
  6. 6.587 − 47 =
  7. 7.343 − 58 =
  8. 8.446 − 18 =
  9. 9.119 − 87 =
  10. 10.432 − 28 =
  11. 11.464 − 79 =
  12. 12.226 − 49 =
  13. 13.409 − 19 =
  14. 14.99 − 48 =
  15. 15.101 − 87 =
  16. 16.185 − 67 =
  17. 17.490 − 17 =
  18. 18.357 − 27 =
  19. 19.191 − 96 =
  20. 20.349 − 36 =
  21. 21.243 − 96 =
  22. 22.300 − 79 =
  23. 23.513 − 17 =
  24. 24.176 − 77 =
  25. 25.137 − 76 =
  26. 26.592 − 29 =
  27. 27.320 − 69 =
  28. 28.348 − 39 =
  29. 29.587 − 66 =
  30. 30.183 − 56 =
  31. 31.229 − 28 =
  32. 32.93 − 48 =
  33. 33.110 − 76 =
  34. 34.132 − 69 =
  35. 35.72 − 47 =
  36. 36.416 − 26 =
  37. 37.127 − 87 =
  38. 38.63 − 16 =
  39. 39.565 − 96 =
  40. 40.160 − 48 =

Answer key

  1. 490
  2. 370
  3. 553
  4. 131
  5. 205
  6. 540
  7. 285
  8. 428
  9. 32
  10. 404
  11. 385
  12. 177
  13. 390
  14. 51
  15. 14
  16. 118
  17. 473
  18. 330
  19. 95
  20. 313
  21. 147
  22. 221
  23. 496
  24. 99
  25. 61
  26. 563
  27. 251
  28. 309
  29. 521
  30. 127
  31. 201
  32. 45
  33. 34
  34. 63
  35. 25
  36. 390
  37. 40
  38. 47
  39. 469
  40. 112

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