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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 745 · 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. 1.304 − 47 =
  2. 2.483 − 37 =
  3. 3.185 − 49 =
  4. 4.168 − 79 =
  5. 5.255 − 78 =
  6. 6.88 − 36 =
  7. 7.235 − 47 =
  8. 8.288 − 77 =
  9. 9.160 − 77 =
  10. 10.236 − 79 =
  11. 11.163 − 98 =
  12. 12.248 − 87 =
  13. 13.140 − 78 =
  14. 14.552 − 57 =
  15. 15.200 − 46 =
  16. 16.282 − 96 =
  17. 17.417 − 86 =
  18. 18.550 − 58 =
  19. 19.394 − 96 =
  20. 20.158 − 38 =
  21. 21.291 − 46 =
  22. 22.448 − 88 =
  23. 23.459 − 88 =
  24. 24.288 − 97 =
  25. 25.120 − 37 =
  26. 26.247 − 99 =
  27. 27.312 − 46 =
  28. 28.581 − 56 =
  29. 29.173 − 87 =
  30. 30.80 − 48 =
  31. 31.122 − 56 =
  32. 32.449 − 89 =
  33. 33.118 − 69 =
  34. 34.566 − 67 =
  35. 35.554 − 78 =
  36. 36.88 − 48 =
  37. 37.272 − 16 =
  38. 38.515 − 39 =
  39. 39.130 − 77 =
  40. 40.392 − 19 =

Answer key

  1. 257
  2. 446
  3. 136
  4. 89
  5. 177
  6. 52
  7. 188
  8. 211
  9. 83
  10. 157
  11. 65
  12. 161
  13. 62
  14. 495
  15. 154
  16. 186
  17. 331
  18. 492
  19. 298
  20. 120
  21. 245
  22. 360
  23. 371
  24. 191
  25. 83
  26. 148
  27. 266
  28. 525
  29. 86
  30. 32
  31. 66
  32. 360
  33. 49
  34. 499
  35. 476
  36. 40
  37. 256
  38. 476
  39. 53
  40. 373

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