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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 195 · 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. 1.101 − 77 =
  2. 2.240 − 77 =
  3. 3.165 − 87 =
  4. 4.184 − 27 =
  5. 5.144 − 97 =
  6. 6.168 − 16 =
  7. 7.138 − 29 =
  8. 8.578 − 76 =
  9. 9.159 − 77 =
  10. 10.402 − 48 =
  11. 11.144 − 57 =
  12. 12.423 − 27 =
  13. 13.579 − 86 =
  14. 14.134 − 69 =
  15. 15.268 − 16 =
  16. 16.194 − 66 =
  17. 17.465 − 56 =
  18. 18.487 − 88 =
  19. 19.266 − 38 =
  20. 20.119 − 28 =
  21. 21.523 − 66 =
  22. 22.98 − 29 =
  23. 23.539 − 17 =
  24. 24.577 − 29 =
  25. 25.146 − 67 =
  26. 26.471 − 69 =
  27. 27.92 − 36 =
  28. 28.292 − 46 =
  29. 29.455 − 26 =
  30. 30.388 − 48 =
  31. 31.569 − 29 =
  32. 32.324 − 77 =
  33. 33.147 − 38 =
  34. 34.406 − 56 =
  35. 35.276 − 48 =
  36. 36.187 − 78 =
  37. 37.521 − 67 =
  38. 38.261 − 98 =
  39. 39.315 − 97 =
  40. 40.238 − 67 =

Answer key

  1. 24
  2. 163
  3. 78
  4. 157
  5. 47
  6. 152
  7. 109
  8. 502
  9. 82
  10. 354
  11. 87
  12. 396
  13. 493
  14. 65
  15. 252
  16. 128
  17. 409
  18. 399
  19. 228
  20. 91
  21. 457
  22. 69
  23. 522
  24. 548
  25. 79
  26. 402
  27. 56
  28. 246
  29. 429
  30. 340
  31. 540
  32. 247
  33. 109
  34. 350
  35. 228
  36. 109
  37. 454
  38. 163
  39. 218
  40. 171

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