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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 542 · 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. 1.206 − 66 =
  2. 2.219 − 38 =
  3. 3.242 − 79 =
  4. 4.170 − 87 =
  5. 5.481 − 79 =
  6. 6.144 − 69 =
  7. 7.181 − 39 =
  8. 8.471 − 47 =
  9. 9.486 − 47 =
  10. 10.112 − 77 =
  11. 11.194 − 58 =
  12. 12.386 − 26 =
  13. 13.560 − 97 =
  14. 14.561 − 18 =
  15. 15.343 − 29 =
  16. 16.211 − 39 =
  17. 17.230 − 89 =
  18. 18.282 − 76 =
  19. 19.552 − 67 =
  20. 20.58 − 29 =
  21. 21.559 − 78 =
  22. 22.492 − 19 =
  23. 23.502 − 26 =
  24. 24.567 − 66 =
  25. 25.563 − 19 =
  26. 26.504 − 58 =
  27. 27.276 − 39 =
  28. 28.580 − 18 =
  29. 29.228 − 66 =
  30. 30.89 − 58 =
  31. 31.120 − 17 =
  32. 32.142 − 76 =
  33. 33.129 − 79 =
  34. 34.175 − 98 =
  35. 35.190 − 87 =
  36. 36.67 − 28 =
  37. 37.156 − 48 =
  38. 38.328 − 26 =
  39. 39.193 − 78 =
  40. 40.197 − 47 =

Answer key

  1. 140
  2. 181
  3. 163
  4. 83
  5. 402
  6. 75
  7. 142
  8. 424
  9. 439
  10. 35
  11. 136
  12. 360
  13. 463
  14. 543
  15. 314
  16. 172
  17. 141
  18. 206
  19. 485
  20. 29
  21. 481
  22. 473
  23. 476
  24. 501
  25. 544
  26. 446
  27. 237
  28. 562
  29. 162
  30. 31
  31. 103
  32. 66
  33. 50
  34. 77
  35. 103
  36. 39
  37. 108
  38. 302
  39. 115
  40. 150

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