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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 142 · 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. 1.119 − 46 =
  2. 2.170 − 87 =
  3. 3.201 − 27 =
  4. 4.310 − 39 =
  5. 5.212 − 67 =
  6. 6.549 − 86 =
  7. 7.509 − 16 =
  8. 8.237 − 36 =
  9. 9.356 − 99 =
  10. 10.236 − 66 =
  11. 11.138 − 67 =
  12. 12.245 − 98 =
  13. 13.231 − 37 =
  14. 14.332 − 97 =
  15. 15.258 − 26 =
  16. 16.286 − 66 =
  17. 17.523 − 98 =
  18. 18.317 − 19 =
  19. 19.524 − 99 =
  20. 20.205 − 28 =
  21. 21.339 − 19 =
  22. 22.537 − 26 =
  23. 23.355 − 58 =
  24. 24.188 − 99 =
  25. 25.500 − 29 =
  26. 26.501 − 16 =
  27. 27.376 − 69 =
  28. 28.176 − 16 =
  29. 29.285 − 36 =
  30. 30.389 − 48 =
  31. 31.585 − 17 =
  32. 32.538 − 66 =
  33. 33.497 − 89 =
  34. 34.142 − 96 =
  35. 35.579 − 68 =
  36. 36.525 − 69 =
  37. 37.207 − 36 =
  38. 38.293 − 98 =
  39. 39.188 − 48 =
  40. 40.183 − 28 =

Answer key

  1. 73
  2. 83
  3. 174
  4. 271
  5. 145
  6. 463
  7. 493
  8. 201
  9. 257
  10. 170
  11. 71
  12. 147
  13. 194
  14. 235
  15. 232
  16. 220
  17. 425
  18. 298
  19. 425
  20. 177
  21. 320
  22. 511
  23. 297
  24. 89
  25. 471
  26. 485
  27. 307
  28. 160
  29. 249
  30. 341
  31. 568
  32. 472
  33. 408
  34. 46
  35. 511
  36. 456
  37. 171
  38. 195
  39. 140
  40. 155

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