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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 63 · 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. 1.223 − 48 =
  2. 2.110 − 87 =
  3. 3.457 − 87 =
  4. 4.189 − 16 =
  5. 5.433 − 36 =
  6. 6.510 − 58 =
  7. 7.202 − 18 =
  8. 8.146 − 28 =
  9. 9.429 − 38 =
  10. 10.210 − 79 =
  11. 11.254 − 38 =
  12. 12.92 − 69 =
  13. 13.356 − 66 =
  14. 14.551 − 96 =
  15. 15.408 − 88 =
  16. 16.137 − 68 =
  17. 17.125 − 16 =
  18. 18.244 − 96 =
  19. 19.283 − 46 =
  20. 20.337 − 26 =
  21. 21.440 − 19 =
  22. 22.378 − 67 =
  23. 23.72 − 69 =
  24. 24.325 − 39 =
  25. 25.194 − 36 =
  26. 26.184 − 96 =
  27. 27.380 − 36 =
  28. 28.193 − 66 =
  29. 29.481 − 99 =
  30. 30.155 − 68 =
  31. 31.578 − 68 =
  32. 32.300 − 28 =
  33. 33.588 − 37 =
  34. 34.408 − 78 =
  35. 35.583 − 49 =
  36. 36.556 − 36 =
  37. 37.567 − 57 =
  38. 38.125 − 66 =
  39. 39.141 − 78 =
  40. 40.519 − 77 =

Answer key

  1. 175
  2. 23
  3. 370
  4. 173
  5. 397
  6. 452
  7. 184
  8. 118
  9. 391
  10. 131
  11. 216
  12. 23
  13. 290
  14. 455
  15. 320
  16. 69
  17. 109
  18. 148
  19. 237
  20. 311
  21. 421
  22. 311
  23. 3
  24. 286
  25. 158
  26. 88
  27. 344
  28. 127
  29. 382
  30. 87
  31. 510
  32. 272
  33. 551
  34. 330
  35. 534
  36. 520
  37. 510
  38. 59
  39. 63
  40. 442

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