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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 401 · 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. 1.208 − 37 =
  2. 2.219 − 57 =
  3. 3.588 − 29 =
  4. 4.596 − 19 =
  5. 5.310 − 57 =
  6. 6.139 − 98 =
  7. 7.233 − 76 =
  8. 8.114 − 69 =
  9. 9.169 − 39 =
  10. 10.165 − 89 =
  11. 11.257 − 88 =
  12. 12.114 − 16 =
  13. 13.102 − 36 =
  14. 14.400 − 36 =
  15. 15.103 − 17 =
  16. 16.154 − 19 =
  17. 17.301 − 48 =
  18. 18.121 − 16 =
  19. 19.402 − 79 =
  20. 20.115 − 16 =
  21. 21.194 − 98 =
  22. 22.374 − 19 =
  23. 23.474 − 27 =
  24. 24.172 − 77 =
  25. 25.431 − 46 =
  26. 26.146 − 58 =
  27. 27.267 − 86 =
  28. 28.175 − 57 =
  29. 29.379 − 26 =
  30. 30.376 − 17 =
  31. 31.134 − 88 =
  32. 32.414 − 26 =
  33. 33.483 − 87 =
  34. 34.300 − 86 =
  35. 35.127 − 96 =
  36. 36.152 − 87 =
  37. 37.209 − 97 =
  38. 38.178 − 47 =
  39. 39.84 − 37 =
  40. 40.337 − 87 =

Answer key

  1. 171
  2. 162
  3. 559
  4. 577
  5. 253
  6. 41
  7. 157
  8. 45
  9. 130
  10. 76
  11. 169
  12. 98
  13. 66
  14. 364
  15. 86
  16. 135
  17. 253
  18. 105
  19. 323
  20. 99
  21. 96
  22. 355
  23. 447
  24. 95
  25. 385
  26. 88
  27. 181
  28. 118
  29. 353
  30. 359
  31. 46
  32. 388
  33. 396
  34. 214
  35. 31
  36. 65
  37. 112
  38. 131
  39. 47
  40. 250

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