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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 288 · 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. 1.492 − 46 =
  2. 2.522 − 77 =
  3. 3.369 − 46 =
  4. 4.93 − 37 =
  5. 5.132 − 38 =
  6. 6.287 − 19 =
  7. 7.196 − 46 =
  8. 8.165 − 66 =
  9. 9.493 − 17 =
  10. 10.329 − 98 =
  11. 11.590 − 28 =
  12. 12.534 − 37 =
  13. 13.392 − 66 =
  14. 14.141 − 36 =
  15. 15.212 − 18 =
  16. 16.152 − 66 =
  17. 17.319 − 96 =
  18. 18.208 − 56 =
  19. 19.580 − 98 =
  20. 20.246 − 78 =
  21. 21.489 − 17 =
  22. 22.228 − 39 =
  23. 23.268 − 18 =
  24. 24.416 − 37 =
  25. 25.503 − 56 =
  26. 26.554 − 99 =
  27. 27.526 − 97 =
  28. 28.168 − 78 =
  29. 29.416 − 99 =
  30. 30.234 − 49 =
  31. 31.165 − 96 =
  32. 32.565 − 56 =
  33. 33.178 − 98 =
  34. 34.354 − 38 =
  35. 35.465 − 36 =
  36. 36.146 − 56 =
  37. 37.302 − 66 =
  38. 38.556 − 17 =
  39. 39.136 − 76 =
  40. 40.328 − 99 =

Answer key

  1. 446
  2. 445
  3. 323
  4. 56
  5. 94
  6. 268
  7. 150
  8. 99
  9. 476
  10. 231
  11. 562
  12. 497
  13. 326
  14. 105
  15. 194
  16. 86
  17. 223
  18. 152
  19. 482
  20. 168
  21. 472
  22. 189
  23. 250
  24. 379
  25. 447
  26. 455
  27. 429
  28. 90
  29. 317
  30. 185
  31. 69
  32. 509
  33. 80
  34. 316
  35. 429
  36. 90
  37. 236
  38. 539
  39. 60
  40. 229

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