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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 588 · 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. 1.220 − 17 =
  2. 2.330 − 27 =
  3. 3.264 − 87 =
  4. 4.476 − 29 =
  5. 5.289 − 39 =
  6. 6.520 − 38 =
  7. 7.551 − 38 =
  8. 8.110 − 77 =
  9. 9.402 − 77 =
  10. 10.161 − 66 =
  11. 11.169 − 26 =
  12. 12.334 − 26 =
  13. 13.161 − 97 =
  14. 14.458 − 36 =
  15. 15.525 − 47 =
  16. 16.320 − 46 =
  17. 17.368 − 67 =
  18. 18.536 − 48 =
  19. 19.174 − 76 =
  20. 20.179 − 56 =
  21. 21.507 − 59 =
  22. 22.271 − 48 =
  23. 23.211 − 29 =
  24. 24.190 − 66 =
  25. 25.593 − 99 =
  26. 26.93 − 59 =
  27. 27.355 − 27 =
  28. 28.262 − 29 =
  29. 29.159 − 59 =
  30. 30.169 − 76 =
  31. 31.465 − 16 =
  32. 32.131 − 97 =
  33. 33.594 − 27 =
  34. 34.398 − 98 =
  35. 35.393 − 46 =
  36. 36.440 − 86 =
  37. 37.467 − 77 =
  38. 38.159 − 27 =
  39. 39.236 − 37 =
  40. 40.218 − 47 =

Answer key

  1. 203
  2. 303
  3. 177
  4. 447
  5. 250
  6. 482
  7. 513
  8. 33
  9. 325
  10. 95
  11. 143
  12. 308
  13. 64
  14. 422
  15. 478
  16. 274
  17. 301
  18. 488
  19. 98
  20. 123
  21. 448
  22. 223
  23. 182
  24. 124
  25. 494
  26. 34
  27. 328
  28. 233
  29. 100
  30. 93
  31. 449
  32. 34
  33. 567
  34. 300
  35. 347
  36. 354
  37. 390
  38. 132
  39. 199
  40. 171

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