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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 389 · 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. 1.477 − 49 =
  2. 2.171 − 19 =
  3. 3.116 − 26 =
  4. 4.554 − 28 =
  5. 5.341 − 59 =
  6. 6.438 − 59 =
  7. 7.278 − 38 =
  8. 8.158 − 78 =
  9. 9.117 − 87 =
  10. 10.555 − 29 =
  11. 11.503 − 88 =
  12. 12.147 − 97 =
  13. 13.246 − 89 =
  14. 14.237 − 16 =
  15. 15.410 − 28 =
  16. 16.295 − 77 =
  17. 17.266 − 67 =
  18. 18.396 − 47 =
  19. 19.193 − 97 =
  20. 20.199 − 28 =
  21. 21.205 − 87 =
  22. 22.486 − 49 =
  23. 23.107 − 87 =
  24. 24.313 − 36 =
  25. 25.480 − 16 =
  26. 26.148 − 49 =
  27. 27.109 − 56 =
  28. 28.370 − 49 =
  29. 29.312 − 79 =
  30. 30.190 − 86 =
  31. 31.503 − 59 =
  32. 32.460 − 68 =
  33. 33.175 − 36 =
  34. 34.314 − 68 =
  35. 35.148 − 29 =
  36. 36.143 − 96 =
  37. 37.296 − 99 =
  38. 38.142 − 37 =
  39. 39.63 − 29 =
  40. 40.535 − 98 =

Answer key

  1. 428
  2. 152
  3. 90
  4. 526
  5. 282
  6. 379
  7. 240
  8. 80
  9. 30
  10. 526
  11. 415
  12. 50
  13. 157
  14. 221
  15. 382
  16. 218
  17. 199
  18. 349
  19. 96
  20. 171
  21. 118
  22. 437
  23. 20
  24. 277
  25. 464
  26. 99
  27. 53
  28. 321
  29. 233
  30. 104
  31. 444
  32. 392
  33. 139
  34. 246
  35. 119
  36. 47
  37. 197
  38. 105
  39. 34
  40. 437

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