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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 472 · 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. 1.279 − 88 =
  2. 2.254 − 59 =
  3. 3.399 − 49 =
  4. 4.127 − 78 =
  5. 5.237 − 26 =
  6. 6.186 − 56 =
  7. 7.187 − 58 =
  8. 8.327 − 26 =
  9. 9.279 − 79 =
  10. 10.287 − 98 =
  11. 11.185 − 76 =
  12. 12.294 − 29 =
  13. 13.52 − 28 =
  14. 14.322 − 17 =
  15. 15.186 − 69 =
  16. 16.210 − 76 =
  17. 17.207 − 88 =
  18. 18.382 − 78 =
  19. 19.349 − 49 =
  20. 20.136 − 89 =
  21. 21.343 − 57 =
  22. 22.296 − 49 =
  23. 23.216 − 28 =
  24. 24.169 − 98 =
  25. 25.255 − 37 =
  26. 26.496 − 26 =
  27. 27.397 − 26 =
  28. 28.179 − 69 =
  29. 29.580 − 46 =
  30. 30.169 − 47 =
  31. 31.260 − 47 =
  32. 32.371 − 37 =
  33. 33.110 − 76 =
  34. 34.253 − 59 =
  35. 35.497 − 29 =
  36. 36.318 − 49 =
  37. 37.558 − 89 =
  38. 38.271 − 77 =
  39. 39.159 − 98 =
  40. 40.569 − 97 =

Answer key

  1. 191
  2. 195
  3. 350
  4. 49
  5. 211
  6. 130
  7. 129
  8. 301
  9. 200
  10. 189
  11. 109
  12. 265
  13. 24
  14. 305
  15. 117
  16. 134
  17. 119
  18. 304
  19. 300
  20. 47
  21. 286
  22. 247
  23. 188
  24. 71
  25. 218
  26. 470
  27. 371
  28. 110
  29. 534
  30. 122
  31. 213
  32. 334
  33. 34
  34. 194
  35. 468
  36. 269
  37. 469
  38. 194
  39. 61
  40. 472

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