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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 216 · 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. 1.441 − 96 =
  2. 2.76 − 17 =
  3. 3.457 − 26 =
  4. 4.596 − 39 =
  5. 5.454 − 28 =
  6. 6.577 − 98 =
  7. 7.316 − 79 =
  8. 8.123 − 38 =
  9. 9.165 − 58 =
  10. 10.225 − 16 =
  11. 11.189 − 67 =
  12. 12.86 − 79 =
  13. 13.513 − 36 =
  14. 14.130 − 16 =
  15. 15.121 − 78 =
  16. 16.335 − 38 =
  17. 17.165 − 67 =
  18. 18.527 − 17 =
  19. 19.363 − 98 =
  20. 20.173 − 26 =
  21. 21.590 − 36 =
  22. 22.70 − 57 =
  23. 23.121 − 88 =
  24. 24.485 − 49 =
  25. 25.168 − 27 =
  26. 26.510 − 16 =
  27. 27.153 − 78 =
  28. 28.481 − 99 =
  29. 29.155 − 96 =
  30. 30.586 − 37 =
  31. 31.447 − 69 =
  32. 32.394 − 27 =
  33. 33.373 − 77 =
  34. 34.229 − 39 =
  35. 35.176 − 57 =
  36. 36.192 − 99 =
  37. 37.343 − 99 =
  38. 38.253 − 46 =
  39. 39.247 − 18 =
  40. 40.195 − 58 =

Answer key

  1. 345
  2. 59
  3. 431
  4. 557
  5. 426
  6. 479
  7. 237
  8. 85
  9. 107
  10. 209
  11. 122
  12. 7
  13. 477
  14. 114
  15. 43
  16. 297
  17. 98
  18. 510
  19. 265
  20. 147
  21. 554
  22. 13
  23. 33
  24. 436
  25. 141
  26. 494
  27. 75
  28. 382
  29. 59
  30. 549
  31. 378
  32. 367
  33. 296
  34. 190
  35. 119
  36. 93
  37. 244
  38. 207
  39. 229
  40. 137

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