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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 898 · 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. 1.182 − 16 =
  2. 2.577 − 46 =
  3. 3.447 − 36 =
  4. 4.544 − 98 =
  5. 5.163 − 39 =
  6. 6.90 − 88 =
  7. 7.358 − 56 =
  8. 8.235 − 98 =
  9. 9.454 − 39 =
  10. 10.378 − 87 =
  11. 11.121 − 17 =
  12. 12.110 − 76 =
  13. 13.155 − 76 =
  14. 14.165 − 86 =
  15. 15.239 − 59 =
  16. 16.253 − 26 =
  17. 17.150 − 28 =
  18. 18.456 − 29 =
  19. 19.223 − 56 =
  20. 20.332 − 98 =
  21. 21.530 − 88 =
  22. 22.248 − 57 =
  23. 23.119 − 26 =
  24. 24.461 − 58 =
  25. 25.164 − 67 =
  26. 26.377 − 47 =
  27. 27.240 − 66 =
  28. 28.370 − 26 =
  29. 29.80 − 38 =
  30. 30.388 − 68 =
  31. 31.180 − 86 =
  32. 32.86 − 19 =
  33. 33.354 − 37 =
  34. 34.284 − 67 =
  35. 35.412 − 59 =
  36. 36.266 − 87 =
  37. 37.102 − 29 =
  38. 38.487 − 27 =
  39. 39.183 − 69 =
  40. 40.423 − 17 =

Answer key

  1. 166
  2. 531
  3. 411
  4. 446
  5. 124
  6. 2
  7. 302
  8. 137
  9. 415
  10. 291
  11. 104
  12. 34
  13. 79
  14. 79
  15. 180
  16. 227
  17. 122
  18. 427
  19. 167
  20. 234
  21. 442
  22. 191
  23. 93
  24. 403
  25. 97
  26. 330
  27. 174
  28. 344
  29. 42
  30. 320
  31. 94
  32. 67
  33. 317
  34. 217
  35. 353
  36. 179
  37. 73
  38. 460
  39. 114
  40. 406

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