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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 911 · 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. 1.451 − 88 =
  2. 2.459 − 27 =
  3. 3.207 − 76 =
  4. 4.552 − 97 =
  5. 5.74 − 26 =
  6. 6.266 − 17 =
  7. 7.496 − 19 =
  8. 8.555 − 76 =
  9. 9.84 − 27 =
  10. 10.144 − 96 =
  11. 11.368 − 66 =
  12. 12.461 − 37 =
  13. 13.482 − 99 =
  14. 14.551 − 57 =
  15. 15.184 − 18 =
  16. 16.265 − 46 =
  17. 17.102 − 68 =
  18. 18.270 − 96 =
  19. 19.125 − 38 =
  20. 20.181 − 16 =
  21. 21.180 − 69 =
  22. 22.169 − 28 =
  23. 23.489 − 66 =
  24. 24.282 − 28 =
  25. 25.191 − 98 =
  26. 26.152 − 18 =
  27. 27.517 − 86 =
  28. 28.318 − 99 =
  29. 29.90 − 36 =
  30. 30.265 − 37 =
  31. 31.565 − 36 =
  32. 32.549 − 97 =
  33. 33.313 − 76 =
  34. 34.197 − 18 =
  35. 35.463 − 99 =
  36. 36.302 − 46 =
  37. 37.190 − 76 =
  38. 38.136 − 77 =
  39. 39.487 − 39 =
  40. 40.252 − 19 =

Answer key

  1. 363
  2. 432
  3. 131
  4. 455
  5. 48
  6. 249
  7. 477
  8. 479
  9. 57
  10. 48
  11. 302
  12. 424
  13. 383
  14. 494
  15. 166
  16. 219
  17. 34
  18. 174
  19. 87
  20. 165
  21. 111
  22. 141
  23. 423
  24. 254
  25. 93
  26. 134
  27. 431
  28. 219
  29. 54
  30. 228
  31. 529
  32. 452
  33. 237
  34. 179
  35. 364
  36. 256
  37. 114
  38. 59
  39. 448
  40. 233

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