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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 249 · 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. 1.557 − 66 =
  2. 2.252 − 96 =
  3. 3.316 − 79 =
  4. 4.169 − 17 =
  5. 5.449 − 39 =
  6. 6.475 − 16 =
  7. 7.429 − 97 =
  8. 8.594 − 58 =
  9. 9.203 − 67 =
  10. 10.438 − 46 =
  11. 11.131 − 47 =
  12. 12.93 − 28 =
  13. 13.324 − 17 =
  14. 14.566 − 16 =
  15. 15.431 − 26 =
  16. 16.271 − 69 =
  17. 17.104 − 16 =
  18. 18.377 − 76 =
  19. 19.594 − 26 =
  20. 20.215 − 66 =
  21. 21.324 − 86 =
  22. 22.190 − 39 =
  23. 23.173 − 39 =
  24. 24.79 − 67 =
  25. 25.52 − 27 =
  26. 26.88 − 28 =
  27. 27.75 − 26 =
  28. 28.69 − 16 =
  29. 29.433 − 16 =
  30. 30.260 − 76 =
  31. 31.121 − 69 =
  32. 32.116 − 26 =
  33. 33.118 − 37 =
  34. 34.239 − 26 =
  35. 35.255 − 19 =
  36. 36.149 − 86 =
  37. 37.203 − 69 =
  38. 38.589 − 68 =
  39. 39.156 − 29 =
  40. 40.229 − 48 =

Answer key

  1. 491
  2. 156
  3. 237
  4. 152
  5. 410
  6. 459
  7. 332
  8. 536
  9. 136
  10. 392
  11. 84
  12. 65
  13. 307
  14. 550
  15. 405
  16. 202
  17. 88
  18. 301
  19. 568
  20. 149
  21. 238
  22. 151
  23. 134
  24. 12
  25. 25
  26. 60
  27. 49
  28. 53
  29. 417
  30. 184
  31. 52
  32. 90
  33. 81
  34. 213
  35. 236
  36. 63
  37. 134
  38. 521
  39. 127
  40. 181

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