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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 566 · 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. 1.181 − 67 =
  2. 2.285 − 17 =
  3. 3.297 − 58 =
  4. 4.330 − 36 =
  5. 5.204 − 96 =
  6. 6.278 − 87 =
  7. 7.457 − 68 =
  8. 8.541 − 69 =
  9. 9.118 − 29 =
  10. 10.405 − 37 =
  11. 11.311 − 79 =
  12. 12.109 − 66 =
  13. 13.190 − 69 =
  14. 14.156 − 57 =
  15. 15.282 − 48 =
  16. 16.164 − 86 =
  17. 17.452 − 58 =
  18. 18.285 − 77 =
  19. 19.126 − 98 =
  20. 20.434 − 57 =
  21. 21.540 − 76 =
  22. 22.471 − 29 =
  23. 23.143 − 36 =
  24. 24.169 − 27 =
  25. 25.148 − 27 =
  26. 26.242 − 56 =
  27. 27.261 − 99 =
  28. 28.285 − 16 =
  29. 29.192 − 26 =
  30. 30.495 − 16 =
  31. 31.115 − 26 =
  32. 32.194 − 57 =
  33. 33.427 − 19 =
  34. 34.413 − 86 =
  35. 35.365 − 88 =
  36. 36.425 − 68 =
  37. 37.453 − 97 =
  38. 38.465 − 16 =
  39. 39.200 − 87 =
  40. 40.171 − 27 =

Answer key

  1. 114
  2. 268
  3. 239
  4. 294
  5. 108
  6. 191
  7. 389
  8. 472
  9. 89
  10. 368
  11. 232
  12. 43
  13. 121
  14. 99
  15. 234
  16. 78
  17. 394
  18. 208
  19. 28
  20. 377
  21. 464
  22. 442
  23. 107
  24. 142
  25. 121
  26. 186
  27. 162
  28. 269
  29. 166
  30. 479
  31. 89
  32. 137
  33. 408
  34. 327
  35. 277
  36. 357
  37. 356
  38. 449
  39. 113
  40. 144

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