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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 784 · 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. 1.521 − 96 =
  2. 2.471 − 58 =
  3. 3.426 − 27 =
  4. 4.213 − 46 =
  5. 5.320 − 99 =
  6. 6.160 − 76 =
  7. 7.156 − 26 =
  8. 8.534 − 78 =
  9. 9.120 − 16 =
  10. 10.88 − 76 =
  11. 11.333 − 29 =
  12. 12.497 − 76 =
  13. 13.424 − 96 =
  14. 14.510 − 87 =
  15. 15.421 − 38 =
  16. 16.566 − 27 =
  17. 17.484 − 48 =
  18. 18.502 − 69 =
  19. 19.540 − 36 =
  20. 20.178 − 29 =
  21. 21.423 − 58 =
  22. 22.478 − 86 =
  23. 23.294 − 67 =
  24. 24.511 − 98 =
  25. 25.160 − 48 =
  26. 26.183 − 97 =
  27. 27.518 − 58 =
  28. 28.507 − 96 =
  29. 29.224 − 38 =
  30. 30.406 − 76 =
  31. 31.529 − 39 =
  32. 32.294 − 86 =
  33. 33.316 − 66 =
  34. 34.583 − 46 =
  35. 35.60 − 58 =
  36. 36.164 − 36 =
  37. 37.129 − 36 =
  38. 38.90 − 86 =
  39. 39.128 − 19 =
  40. 40.581 − 26 =

Answer key

  1. 425
  2. 413
  3. 399
  4. 167
  5. 221
  6. 84
  7. 130
  8. 456
  9. 104
  10. 12
  11. 304
  12. 421
  13. 328
  14. 423
  15. 383
  16. 539
  17. 436
  18. 433
  19. 504
  20. 149
  21. 365
  22. 392
  23. 227
  24. 413
  25. 112
  26. 86
  27. 460
  28. 411
  29. 186
  30. 330
  31. 490
  32. 208
  33. 250
  34. 537
  35. 2
  36. 128
  37. 93
  38. 4
  39. 109
  40. 555

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