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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 847 · 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. 1.184 − 96 =
  2. 2.202 − 88 =
  3. 3.161 − 67 =
  4. 4.354 − 38 =
  5. 5.103 − 69 =
  6. 6.60 − 29 =
  7. 7.118 − 56 =
  8. 8.568 − 16 =
  9. 9.132 − 99 =
  10. 10.195 − 48 =
  11. 11.544 − 39 =
  12. 12.510 − 27 =
  13. 13.499 − 68 =
  14. 14.284 − 47 =
  15. 15.472 − 78 =
  16. 16.258 − 99 =
  17. 17.371 − 96 =
  18. 18.96 − 19 =
  19. 19.552 − 56 =
  20. 20.175 − 18 =
  21. 21.388 − 16 =
  22. 22.280 − 66 =
  23. 23.107 − 49 =
  24. 24.591 − 99 =
  25. 25.488 − 76 =
  26. 26.101 − 78 =
  27. 27.258 − 77 =
  28. 28.348 − 26 =
  29. 29.423 − 76 =
  30. 30.320 − 98 =
  31. 31.115 − 16 =
  32. 32.128 − 57 =
  33. 33.551 − 46 =
  34. 34.312 − 47 =
  35. 35.564 − 78 =
  36. 36.489 − 39 =
  37. 37.496 − 16 =
  38. 38.90 − 38 =
  39. 39.62 − 28 =
  40. 40.78 − 19 =

Answer key

  1. 88
  2. 114
  3. 94
  4. 316
  5. 34
  6. 31
  7. 62
  8. 552
  9. 33
  10. 147
  11. 505
  12. 483
  13. 431
  14. 237
  15. 394
  16. 159
  17. 275
  18. 77
  19. 496
  20. 157
  21. 372
  22. 214
  23. 58
  24. 492
  25. 412
  26. 23
  27. 181
  28. 322
  29. 347
  30. 222
  31. 99
  32. 71
  33. 505
  34. 265
  35. 486
  36. 450
  37. 480
  38. 52
  39. 34
  40. 59

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