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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 572 · 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. 1.501 − 38 =
  2. 2.124 − 59 =
  3. 3.267 − 67 =
  4. 4.480 − 98 =
  5. 5.461 − 69 =
  6. 6.402 − 59 =
  7. 7.470 − 26 =
  8. 8.581 − 69 =
  9. 9.147 − 38 =
  10. 10.387 − 97 =
  11. 11.54 − 26 =
  12. 12.154 − 78 =
  13. 13.234 − 77 =
  14. 14.133 − 48 =
  15. 15.358 − 76 =
  16. 16.564 − 66 =
  17. 17.84 − 38 =
  18. 18.124 − 16 =
  19. 19.358 − 78 =
  20. 20.63 − 17 =
  21. 21.493 − 36 =
  22. 22.113 − 57 =
  23. 23.379 − 27 =
  24. 24.349 − 47 =
  25. 25.505 − 18 =
  26. 26.156 − 17 =
  27. 27.186 − 36 =
  28. 28.209 − 57 =
  29. 29.183 − 48 =
  30. 30.505 − 39 =
  31. 31.402 − 77 =
  32. 32.197 − 19 =
  33. 33.127 − 56 =
  34. 34.591 − 38 =
  35. 35.109 − 29 =
  36. 36.162 − 39 =
  37. 37.287 − 86 =
  38. 38.131 − 88 =
  39. 39.183 − 78 =
  40. 40.472 − 17 =

Answer key

  1. 463
  2. 65
  3. 200
  4. 382
  5. 392
  6. 343
  7. 444
  8. 512
  9. 109
  10. 290
  11. 28
  12. 76
  13. 157
  14. 85
  15. 282
  16. 498
  17. 46
  18. 108
  19. 280
  20. 46
  21. 457
  22. 56
  23. 352
  24. 302
  25. 487
  26. 139
  27. 150
  28. 152
  29. 135
  30. 466
  31. 325
  32. 178
  33. 71
  34. 553
  35. 80
  36. 123
  37. 201
  38. 43
  39. 105
  40. 455

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