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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 22 · 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. 1.497 − 19 =
  2. 2.136 − 97 =
  3. 3.147 − 89 =
  4. 4.238 − 37 =
  5. 5.486 − 26 =
  6. 6.327 − 67 =
  7. 7.445 − 26 =
  8. 8.179 − 66 =
  9. 9.239 − 99 =
  10. 10.180 − 36 =
  11. 11.283 − 86 =
  12. 12.231 − 79 =
  13. 13.177 − 97 =
  14. 14.211 − 36 =
  15. 15.179 − 97 =
  16. 16.377 − 98 =
  17. 17.473 − 66 =
  18. 18.327 − 38 =
  19. 19.90 − 77 =
  20. 20.298 − 18 =
  21. 21.181 − 36 =
  22. 22.529 − 46 =
  23. 23.233 − 88 =
  24. 24.405 − 66 =
  25. 25.73 − 16 =
  26. 26.146 − 67 =
  27. 27.201 − 99 =
  28. 28.580 − 98 =
  29. 29.558 − 76 =
  30. 30.387 − 47 =
  31. 31.530 − 99 =
  32. 32.162 − 89 =
  33. 33.391 − 37 =
  34. 34.102 − 39 =
  35. 35.351 − 59 =
  36. 36.365 − 47 =
  37. 37.576 − 29 =
  38. 38.485 − 47 =
  39. 39.111 − 96 =
  40. 40.154 − 98 =

Answer key

  1. 478
  2. 39
  3. 58
  4. 201
  5. 460
  6. 260
  7. 419
  8. 113
  9. 140
  10. 144
  11. 197
  12. 152
  13. 80
  14. 175
  15. 82
  16. 279
  17. 407
  18. 289
  19. 13
  20. 280
  21. 145
  22. 483
  23. 145
  24. 339
  25. 57
  26. 79
  27. 102
  28. 482
  29. 482
  30. 340
  31. 431
  32. 73
  33. 354
  34. 63
  35. 292
  36. 318
  37. 547
  38. 438
  39. 15
  40. 56

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