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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 635 · 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. 1.354 − 47 =
  2. 2.170 − 57 =
  3. 3.325 − 48 =
  4. 4.365 − 17 =
  5. 5.77 − 27 =
  6. 6.323 − 88 =
  7. 7.332 − 19 =
  8. 8.273 − 18 =
  9. 9.98 − 87 =
  10. 10.562 − 37 =
  11. 11.389 − 97 =
  12. 12.124 − 99 =
  13. 13.390 − 89 =
  14. 14.168 − 56 =
  15. 15.201 − 79 =
  16. 16.219 − 96 =
  17. 17.427 − 38 =
  18. 18.461 − 78 =
  19. 19.128 − 89 =
  20. 20.132 − 29 =
  21. 21.306 − 17 =
  22. 22.277 − 99 =
  23. 23.213 − 18 =
  24. 24.191 − 96 =
  25. 25.483 − 37 =
  26. 26.576 − 37 =
  27. 27.156 − 78 =
  28. 28.304 − 96 =
  29. 29.63 − 46 =
  30. 30.208 − 29 =
  31. 31.384 − 27 =
  32. 32.174 − 16 =
  33. 33.71 − 29 =
  34. 34.267 − 96 =
  35. 35.545 − 18 =
  36. 36.272 − 96 =
  37. 37.537 − 39 =
  38. 38.563 − 16 =
  39. 39.389 − 27 =
  40. 40.254 − 18 =

Answer key

  1. 307
  2. 113
  3. 277
  4. 348
  5. 50
  6. 235
  7. 313
  8. 255
  9. 11
  10. 525
  11. 292
  12. 25
  13. 301
  14. 112
  15. 122
  16. 123
  17. 389
  18. 383
  19. 39
  20. 103
  21. 289
  22. 178
  23. 195
  24. 95
  25. 446
  26. 539
  27. 78
  28. 208
  29. 17
  30. 179
  31. 357
  32. 158
  33. 42
  34. 171
  35. 527
  36. 176
  37. 498
  38. 547
  39. 362
  40. 236

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