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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 370 · 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. 1.123 − 16 =
  2. 2.62 − 29 =
  3. 3.497 − 99 =
  4. 4.563 − 67 =
  5. 5.521 − 56 =
  6. 6.324 − 26 =
  7. 7.130 − 58 =
  8. 8.208 − 78 =
  9. 9.145 − 97 =
  10. 10.122 − 68 =
  11. 11.93 − 39 =
  12. 12.166 − 37 =
  13. 13.565 − 79 =
  14. 14.263 − 38 =
  15. 15.127 − 58 =
  16. 16.316 − 28 =
  17. 17.76 − 66 =
  18. 18.551 − 79 =
  19. 19.328 − 67 =
  20. 20.333 − 78 =
  21. 21.175 − 99 =
  22. 22.327 − 26 =
  23. 23.126 − 57 =
  24. 24.59 − 37 =
  25. 25.369 − 26 =
  26. 26.548 − 49 =
  27. 27.477 − 56 =
  28. 28.248 − 86 =
  29. 29.120 − 89 =
  30. 30.584 − 87 =
  31. 31.379 − 49 =
  32. 32.170 − 68 =
  33. 33.93 − 58 =
  34. 34.103 − 47 =
  35. 35.190 − 87 =
  36. 36.317 − 88 =
  37. 37.329 − 79 =
  38. 38.510 − 17 =
  39. 39.484 − 48 =
  40. 40.111 − 57 =

Answer key

  1. 107
  2. 33
  3. 398
  4. 496
  5. 465
  6. 298
  7. 72
  8. 130
  9. 48
  10. 54
  11. 54
  12. 129
  13. 486
  14. 225
  15. 69
  16. 288
  17. 10
  18. 472
  19. 261
  20. 255
  21. 76
  22. 301
  23. 69
  24. 22
  25. 343
  26. 499
  27. 421
  28. 162
  29. 31
  30. 497
  31. 330
  32. 102
  33. 35
  34. 56
  35. 103
  36. 229
  37. 250
  38. 493
  39. 436
  40. 54

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