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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 244 · 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. 1.181 − 69 =
  2. 2.584 − 26 =
  3. 3.577 − 89 =
  4. 4.161 − 96 =
  5. 5.586 − 69 =
  6. 6.187 − 89 =
  7. 7.69 − 29 =
  8. 8.536 − 16 =
  9. 9.245 − 79 =
  10. 10.54 − 48 =
  11. 11.562 − 59 =
  12. 12.551 − 28 =
  13. 13.434 − 69 =
  14. 14.165 − 56 =
  15. 15.154 − 66 =
  16. 16.192 − 16 =
  17. 17.297 − 58 =
  18. 18.458 − 27 =
  19. 19.320 − 76 =
  20. 20.287 − 38 =
  21. 21.115 − 99 =
  22. 22.274 − 29 =
  23. 23.412 − 89 =
  24. 24.189 − 69 =
  25. 25.542 − 77 =
  26. 26.447 − 18 =
  27. 27.455 − 66 =
  28. 28.185 − 99 =
  29. 29.443 − 59 =
  30. 30.565 − 86 =
  31. 31.321 − 87 =
  32. 32.208 − 79 =
  33. 33.279 − 26 =
  34. 34.215 − 57 =
  35. 35.514 − 36 =
  36. 36.350 − 18 =
  37. 37.189 − 37 =
  38. 38.533 − 48 =
  39. 39.407 − 36 =
  40. 40.389 − 87 =

Answer key

  1. 112
  2. 558
  3. 488
  4. 65
  5. 517
  6. 98
  7. 40
  8. 520
  9. 166
  10. 6
  11. 503
  12. 523
  13. 365
  14. 109
  15. 88
  16. 176
  17. 239
  18. 431
  19. 244
  20. 249
  21. 16
  22. 245
  23. 323
  24. 120
  25. 465
  26. 429
  27. 389
  28. 86
  29. 384
  30. 479
  31. 234
  32. 129
  33. 253
  34. 158
  35. 478
  36. 332
  37. 152
  38. 485
  39. 371
  40. 302

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