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Method and examples
Complement Subtraction Method
 
1. 9's Complement Subtraction Method
 
Number-1 Number-2
  1. 470 - 231 using 9's complement method
  2. 670 - 831 using 9's complement method

2. 9's Complement Method
 
Number
  1. 9's complement of 470
  2. 9's complement of 670
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