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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 613 · 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. 1.275 − 27 =
  2. 2.422 − 99 =
  3. 3.78 − 27 =
  4. 4.149 − 36 =
  5. 5.526 − 38 =
  6. 6.597 − 66 =
  7. 7.250 − 37 =
  8. 8.58 − 37 =
  9. 9.181 − 97 =
  10. 10.510 − 27 =
  11. 11.498 − 78 =
  12. 12.321 − 46 =
  13. 13.442 − 16 =
  14. 14.188 − 68 =
  15. 15.147 − 16 =
  16. 16.133 − 89 =
  17. 17.146 − 58 =
  18. 18.527 − 57 =
  19. 19.288 − 78 =
  20. 20.327 − 76 =
  21. 21.275 − 96 =
  22. 22.382 − 19 =
  23. 23.175 − 68 =
  24. 24.148 − 18 =
  25. 25.224 − 78 =
  26. 26.197 − 67 =
  27. 27.165 − 97 =
  28. 28.150 − 68 =
  29. 29.516 − 89 =
  30. 30.262 − 68 =
  31. 31.75 − 68 =
  32. 32.67 − 37 =
  33. 33.397 − 28 =
  34. 34.195 − 28 =
  35. 35.185 − 16 =
  36. 36.490 − 47 =
  37. 37.126 − 57 =
  38. 38.112 − 26 =
  39. 39.546 − 96 =
  40. 40.332 − 36 =

Answer key

  1. 248
  2. 323
  3. 51
  4. 113
  5. 488
  6. 531
  7. 213
  8. 21
  9. 84
  10. 483
  11. 420
  12. 275
  13. 426
  14. 120
  15. 131
  16. 44
  17. 88
  18. 470
  19. 210
  20. 251
  21. 179
  22. 363
  23. 107
  24. 130
  25. 146
  26. 130
  27. 68
  28. 82
  29. 427
  30. 194
  31. 7
  32. 30
  33. 369
  34. 167
  35. 169
  36. 443
  37. 69
  38. 86
  39. 450
  40. 296

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