Simplifying Calculations -2

To subtract a number from 100 or 1000 or 10000 or 100000 etc, we use the formula ' All from 9 and the last from 10".
Let us learn by an example:

Case 1:  When the number to be subtracted has number of digits same as number of zeroes in other number.
              Subtract 324708 from 1000000.
           
             1000000
           -  324708
      _______________
               675292 
We start from left. Subtract each digit from 9 i.e. 9-3=6, 9-2=7, 9-4=5 and so on.
The last digit i.e. 8 has to be subtracted from 10.

Case 2:  The number to be subtracted has less number of digits than number of zeroes in other number.
Subtract  596 from 100000.
             
               100000
             -       596
            _________

First we will write two zeroes before 5 to make number of digits equal to number of zeroes in upper number. Here we go.
                100000
             -    00596
          __________________
                   99404

This is how we can subtract without using the process of borrowing.