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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 714 · 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. 1.402 − 46 =
  2. 2.394 − 87 =
  3. 3.294 − 26 =
  4. 4.541 − 48 =
  5. 5.118 − 18 =
  6. 6.427 − 59 =
  7. 7.115 − 46 =
  8. 8.417 − 87 =
  9. 9.556 − 48 =
  10. 10.322 − 18 =
  11. 11.400 − 58 =
  12. 12.377 − 67 =
  13. 13.88 − 27 =
  14. 14.280 − 46 =
  15. 15.93 − 37 =
  16. 16.332 − 57 =
  17. 17.170 − 98 =
  18. 18.536 − 16 =
  19. 19.244 − 79 =
  20. 20.170 − 38 =
  21. 21.489 − 49 =
  22. 22.525 − 88 =
  23. 23.382 − 26 =
  24. 24.576 − 88 =
  25. 25.596 − 47 =
  26. 26.208 − 76 =
  27. 27.396 − 89 =
  28. 28.502 − 36 =
  29. 29.87 − 27 =
  30. 30.373 − 17 =
  31. 31.129 − 46 =
  32. 32.303 − 88 =
  33. 33.149 − 59 =
  34. 34.458 − 87 =
  35. 35.519 − 29 =
  36. 36.303 − 47 =
  37. 37.279 − 66 =
  38. 38.382 − 87 =
  39. 39.395 − 58 =
  40. 40.130 − 58 =

Answer key

  1. 356
  2. 307
  3. 268
  4. 493
  5. 100
  6. 368
  7. 69
  8. 330
  9. 508
  10. 304
  11. 342
  12. 310
  13. 61
  14. 234
  15. 56
  16. 275
  17. 72
  18. 520
  19. 165
  20. 132
  21. 440
  22. 437
  23. 356
  24. 488
  25. 549
  26. 132
  27. 307
  28. 466
  29. 60
  30. 356
  31. 83
  32. 215
  33. 90
  34. 371
  35. 490
  36. 256
  37. 213
  38. 295
  39. 337
  40. 72

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