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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 165 · 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. 1.196 − 78 =
  2. 2.109 − 48 =
  3. 3.575 − 98 =
  4. 4.334 − 17 =
  5. 5.154 − 69 =
  6. 6.460 − 26 =
  7. 7.93 − 78 =
  8. 8.164 − 56 =
  9. 9.535 − 68 =
  10. 10.138 − 27 =
  11. 11.175 − 49 =
  12. 12.439 − 68 =
  13. 13.305 − 86 =
  14. 14.154 − 96 =
  15. 15.382 − 86 =
  16. 16.142 − 78 =
  17. 17.437 − 37 =
  18. 18.141 − 19 =
  19. 19.502 − 78 =
  20. 20.475 − 39 =
  21. 21.521 − 86 =
  22. 22.278 − 77 =
  23. 23.84 − 26 =
  24. 24.429 − 56 =
  25. 25.252 − 17 =
  26. 26.446 − 49 =
  27. 27.251 − 19 =
  28. 28.104 − 99 =
  29. 29.445 − 26 =
  30. 30.291 − 88 =
  31. 31.345 − 46 =
  32. 32.243 − 69 =
  33. 33.572 − 98 =
  34. 34.73 − 39 =
  35. 35.253 − 79 =
  36. 36.596 − 69 =
  37. 37.398 − 36 =
  38. 38.512 − 47 =
  39. 39.490 − 86 =
  40. 40.476 − 17 =

Answer key

  1. 118
  2. 61
  3. 477
  4. 317
  5. 85
  6. 434
  7. 15
  8. 108
  9. 467
  10. 111
  11. 126
  12. 371
  13. 219
  14. 58
  15. 296
  16. 64
  17. 400
  18. 122
  19. 424
  20. 436
  21. 435
  22. 201
  23. 58
  24. 373
  25. 235
  26. 397
  27. 232
  28. 5
  29. 419
  30. 203
  31. 299
  32. 174
  33. 474
  34. 34
  35. 174
  36. 527
  37. 362
  38. 465
  39. 404
  40. 459

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