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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 882 · 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. 1.124 − 77 =
  2. 2.113 − 56 =
  3. 3.257 − 89 =
  4. 4.58 − 29 =
  5. 5.222 − 66 =
  6. 6.216 − 97 =
  7. 7.291 − 39 =
  8. 8.72 − 16 =
  9. 9.131 − 86 =
  10. 10.159 − 67 =
  11. 11.111 − 26 =
  12. 12.327 − 99 =
  13. 13.65 − 17 =
  14. 14.335 − 57 =
  15. 15.108 − 29 =
  16. 16.177 − 66 =
  17. 17.66 − 26 =
  18. 18.494 − 38 =
  19. 19.327 − 36 =
  20. 20.501 − 79 =
  21. 21.561 − 27 =
  22. 22.306 − 89 =
  23. 23.496 − 98 =
  24. 24.69 − 37 =
  25. 25.62 − 49 =
  26. 26.206 − 57 =
  27. 27.272 − 46 =
  28. 28.230 − 26 =
  29. 29.446 − 29 =
  30. 30.173 − 16 =
  31. 31.210 − 98 =
  32. 32.577 − 36 =
  33. 33.531 − 99 =
  34. 34.419 − 57 =
  35. 35.119 − 28 =
  36. 36.373 − 57 =
  37. 37.321 − 47 =
  38. 38.420 − 29 =
  39. 39.309 − 48 =
  40. 40.87 − 69 =

Answer key

  1. 47
  2. 57
  3. 168
  4. 29
  5. 156
  6. 119
  7. 252
  8. 56
  9. 45
  10. 92
  11. 85
  12. 228
  13. 48
  14. 278
  15. 79
  16. 111
  17. 40
  18. 456
  19. 291
  20. 422
  21. 534
  22. 217
  23. 398
  24. 32
  25. 13
  26. 149
  27. 226
  28. 204
  29. 417
  30. 157
  31. 112
  32. 541
  33. 432
  34. 362
  35. 91
  36. 316
  37. 274
  38. 391
  39. 261
  40. 18

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