Method : 10's complement of a number is 1 added to it's 9's complement number.
1. Find 10's complement of 470
Note : 10's complement of a number is 1 added to it's 9's complement number.
9's complement of 470 is
Now add 1 : 529 + 1 = 530
2. Find 10's complement of 670
Note : 10's complement of a number is 1 added to it's 9's complement number.
9's complement of 670 is
Now add 1 : 329 + 1 = 330
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