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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 106 · 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. 1.469 − 66 =
  2. 2.373 − 28 =
  3. 3.261 − 48 =
  4. 4.106 − 46 =
  5. 5.432 − 66 =
  6. 6.386 − 27 =
  7. 7.73 − 18 =
  8. 8.156 − 26 =
  9. 9.187 − 76 =
  10. 10.121 − 88 =
  11. 11.158 − 28 =
  12. 12.402 − 27 =
  13. 13.160 − 47 =
  14. 14.500 − 27 =
  15. 15.583 − 99 =
  16. 16.112 − 98 =
  17. 17.199 − 98 =
  18. 18.572 − 96 =
  19. 19.154 − 18 =
  20. 20.103 − 66 =
  21. 21.164 − 38 =
  22. 22.201 − 26 =
  23. 23.403 − 66 =
  24. 24.338 − 98 =
  25. 25.176 − 46 =
  26. 26.132 − 78 =
  27. 27.580 − 46 =
  28. 28.141 − 48 =
  29. 29.202 − 37 =
  30. 30.356 − 26 =
  31. 31.509 − 69 =
  32. 32.96 − 48 =
  33. 33.253 − 68 =
  34. 34.362 − 56 =
  35. 35.145 − 98 =
  36. 36.233 − 39 =
  37. 37.117 − 56 =
  38. 38.109 − 99 =
  39. 39.465 − 46 =
  40. 40.241 − 68 =

Answer key

  1. 403
  2. 345
  3. 213
  4. 60
  5. 366
  6. 359
  7. 55
  8. 130
  9. 111
  10. 33
  11. 130
  12. 375
  13. 113
  14. 473
  15. 484
  16. 14
  17. 101
  18. 476
  19. 136
  20. 37
  21. 126
  22. 175
  23. 337
  24. 240
  25. 130
  26. 54
  27. 534
  28. 93
  29. 165
  30. 330
  31. 440
  32. 48
  33. 185
  34. 306
  35. 47
  36. 194
  37. 61
  38. 10
  39. 419
  40. 173

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