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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 449 · 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 − 18 =
  2. 2.74 − 58 =
  3. 3.138 − 37 =
  4. 4.262 − 26 =
  5. 5.375 − 88 =
  6. 6.166 − 77 =
  7. 7.307 − 59 =
  8. 8.471 − 26 =
  9. 9.290 − 96 =
  10. 10.94 − 16 =
  11. 11.154 − 38 =
  12. 12.73 − 19 =
  13. 13.158 − 37 =
  14. 14.351 − 19 =
  15. 15.169 − 56 =
  16. 16.289 − 59 =
  17. 17.226 − 46 =
  18. 18.120 − 47 =
  19. 19.374 − 76 =
  20. 20.486 − 47 =
  21. 21.171 − 77 =
  22. 22.59 − 17 =
  23. 23.222 − 68 =
  24. 24.170 − 89 =
  25. 25.176 − 76 =
  26. 26.297 − 48 =
  27. 27.95 − 77 =
  28. 28.228 − 56 =
  29. 29.420 − 46 =
  30. 30.101 − 58 =
  31. 31.447 − 37 =
  32. 32.567 − 27 =
  33. 33.121 − 78 =
  34. 34.536 − 18 =
  35. 35.157 − 68 =
  36. 36.124 − 19 =
  37. 37.437 − 29 =
  38. 38.196 − 96 =
  39. 39.182 − 58 =
  40. 40.152 − 56 =

Answer key

  1. 83
  2. 16
  3. 101
  4. 236
  5. 287
  6. 89
  7. 248
  8. 445
  9. 194
  10. 78
  11. 116
  12. 54
  13. 121
  14. 332
  15. 113
  16. 230
  17. 180
  18. 73
  19. 298
  20. 439
  21. 94
  22. 42
  23. 154
  24. 81
  25. 100
  26. 249
  27. 18
  28. 172
  29. 374
  30. 43
  31. 410
  32. 540
  33. 43
  34. 518
  35. 89
  36. 105
  37. 408
  38. 100
  39. 124
  40. 96

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