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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 393 · 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. 1.211 − 48 =
  2. 2.261 − 77 =
  3. 3.116 − 97 =
  4. 4.510 − 37 =
  5. 5.458 − 37 =
  6. 6.165 − 96 =
  7. 7.208 − 27 =
  8. 8.310 − 38 =
  9. 9.109 − 76 =
  10. 10.487 − 76 =
  11. 11.112 − 38 =
  12. 12.243 − 67 =
  13. 13.404 − 39 =
  14. 14.258 − 46 =
  15. 15.575 − 17 =
  16. 16.180 − 48 =
  17. 17.103 − 27 =
  18. 18.309 − 38 =
  19. 19.109 − 18 =
  20. 20.235 − 38 =
  21. 21.210 − 58 =
  22. 22.134 − 99 =
  23. 23.396 − 77 =
  24. 24.170 − 28 =
  25. 25.355 − 19 =
  26. 26.222 − 19 =
  27. 27.137 − 79 =
  28. 28.546 − 39 =
  29. 29.99 − 16 =
  30. 30.333 − 38 =
  31. 31.574 − 97 =
  32. 32.231 − 76 =
  33. 33.224 − 56 =
  34. 34.486 − 67 =
  35. 35.276 − 28 =
  36. 36.132 − 16 =
  37. 37.533 − 56 =
  38. 38.361 − 49 =
  39. 39.153 − 46 =
  40. 40.86 − 47 =

Answer key

  1. 163
  2. 184
  3. 19
  4. 473
  5. 421
  6. 69
  7. 181
  8. 272
  9. 33
  10. 411
  11. 74
  12. 176
  13. 365
  14. 212
  15. 558
  16. 132
  17. 76
  18. 271
  19. 91
  20. 197
  21. 152
  22. 35
  23. 319
  24. 142
  25. 336
  26. 203
  27. 58
  28. 507
  29. 83
  30. 295
  31. 477
  32. 155
  33. 168
  34. 419
  35. 248
  36. 116
  37. 477
  38. 312
  39. 107
  40. 39

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