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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 586 · 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. 1.587 − 69 =
  2. 2.447 − 59 =
  3. 3.468 − 79 =
  4. 4.552 − 16 =
  5. 5.529 − 67 =
  6. 6.158 − 87 =
  7. 7.519 − 69 =
  8. 8.141 − 69 =
  9. 9.236 − 56 =
  10. 10.550 − 46 =
  11. 11.156 − 77 =
  12. 12.299 − 56 =
  13. 13.168 − 79 =
  14. 14.99 − 49 =
  15. 15.556 − 76 =
  16. 16.161 − 58 =
  17. 17.323 − 69 =
  18. 18.385 − 28 =
  19. 19.333 − 77 =
  20. 20.404 − 26 =
  21. 21.312 − 48 =
  22. 22.136 − 39 =
  23. 23.444 − 48 =
  24. 24.329 − 19 =
  25. 25.346 − 76 =
  26. 26.387 − 19 =
  27. 27.434 − 16 =
  28. 28.112 − 49 =
  29. 29.250 − 96 =
  30. 30.193 − 37 =
  31. 31.565 − 69 =
  32. 32.450 − 18 =
  33. 33.573 − 79 =
  34. 34.538 − 96 =
  35. 35.233 − 77 =
  36. 36.449 − 76 =
  37. 37.145 − 37 =
  38. 38.134 − 79 =
  39. 39.482 − 69 =
  40. 40.490 − 99 =

Answer key

  1. 518
  2. 388
  3. 389
  4. 536
  5. 462
  6. 71
  7. 450
  8. 72
  9. 180
  10. 504
  11. 79
  12. 243
  13. 89
  14. 50
  15. 480
  16. 103
  17. 254
  18. 357
  19. 256
  20. 378
  21. 264
  22. 97
  23. 396
  24. 310
  25. 270
  26. 368
  27. 418
  28. 63
  29. 154
  30. 156
  31. 496
  32. 432
  33. 494
  34. 442
  35. 156
  36. 373
  37. 108
  38. 55
  39. 413
  40. 391

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