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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 367 · 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. 1.167 − 59 =
  2. 2.397 − 46 =
  3. 3.170 − 76 =
  4. 4.200 − 26 =
  5. 5.92 − 46 =
  6. 6.126 − 17 =
  7. 7.60 − 27 =
  8. 8.95 − 48 =
  9. 9.380 − 79 =
  10. 10.344 − 48 =
  11. 11.156 − 79 =
  12. 12.152 − 96 =
  13. 13.392 − 28 =
  14. 14.196 − 96 =
  15. 15.324 − 68 =
  16. 16.301 − 56 =
  17. 17.307 − 28 =
  18. 18.109 − 18 =
  19. 19.298 − 19 =
  20. 20.140 − 98 =
  21. 21.513 − 16 =
  22. 22.137 − 17 =
  23. 23.338 − 57 =
  24. 24.70 − 49 =
  25. 25.535 − 88 =
  26. 26.242 − 17 =
  27. 27.176 − 86 =
  28. 28.555 − 38 =
  29. 29.158 − 77 =
  30. 30.520 − 56 =
  31. 31.522 − 66 =
  32. 32.331 − 28 =
  33. 33.538 − 16 =
  34. 34.174 − 99 =
  35. 35.378 − 97 =
  36. 36.208 − 56 =
  37. 37.129 − 47 =
  38. 38.328 − 27 =
  39. 39.395 − 96 =
  40. 40.209 − 28 =

Answer key

  1. 108
  2. 351
  3. 94
  4. 174
  5. 46
  6. 109
  7. 33
  8. 47
  9. 301
  10. 296
  11. 77
  12. 56
  13. 364
  14. 100
  15. 256
  16. 245
  17. 279
  18. 91
  19. 279
  20. 42
  21. 497
  22. 120
  23. 281
  24. 21
  25. 447
  26. 225
  27. 90
  28. 517
  29. 81
  30. 464
  31. 456
  32. 303
  33. 522
  34. 75
  35. 281
  36. 152
  37. 82
  38. 301
  39. 299
  40. 181

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