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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 758 · 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. 1.294 − 56 =
  2. 2.183 − 36 =
  3. 3.301 − 27 =
  4. 4.415 − 17 =
  5. 5.283 − 87 =
  6. 6.599 − 39 =
  7. 7.178 − 88 =
  8. 8.380 − 39 =
  9. 9.234 − 49 =
  10. 10.502 − 68 =
  11. 11.167 − 98 =
  12. 12.137 − 28 =
  13. 13.466 − 89 =
  14. 14.204 − 39 =
  15. 15.357 − 98 =
  16. 16.468 − 77 =
  17. 17.497 − 49 =
  18. 18.280 − 56 =
  19. 19.521 − 99 =
  20. 20.391 − 16 =
  21. 21.333 − 99 =
  22. 22.544 − 88 =
  23. 23.320 − 38 =
  24. 24.519 − 76 =
  25. 25.372 − 49 =
  26. 26.419 − 39 =
  27. 27.124 − 48 =
  28. 28.307 − 18 =
  29. 29.155 − 79 =
  30. 30.230 − 88 =
  31. 31.171 − 49 =
  32. 32.191 − 96 =
  33. 33.358 − 47 =
  34. 34.523 − 66 =
  35. 35.343 − 26 =
  36. 36.122 − 28 =
  37. 37.566 − 56 =
  38. 38.128 − 99 =
  39. 39.394 − 16 =
  40. 40.395 − 98 =

Answer key

  1. 238
  2. 147
  3. 274
  4. 398
  5. 196
  6. 560
  7. 90
  8. 341
  9. 185
  10. 434
  11. 69
  12. 109
  13. 377
  14. 165
  15. 259
  16. 391
  17. 448
  18. 224
  19. 422
  20. 375
  21. 234
  22. 456
  23. 282
  24. 443
  25. 323
  26. 380
  27. 76
  28. 289
  29. 76
  30. 142
  31. 122
  32. 95
  33. 311
  34. 457
  35. 317
  36. 94
  37. 510
  38. 29
  39. 378
  40. 297

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