SUBTRACTION USING BAR NUMBER

SUBTRACTION USING BAR NUMBER
These bar numbers give us an alternative way of subtracting numbers.SUBTRACTION is very easy using bar number.

    3 4 5
-
    1 6 7
----------
       _  _
   2  2  2

 If top number is grater than the bottom number  then we subtract is as usual but bottom number is greater than the top number then we have to subtract it and write a negative answer.
 5-7=-2
4-6=-2
3-1= 2
                                     
  now remove bar it is 178


 6 7 6 7
 1 9 0 8 –
_______
   _       _
5 2  6   1     =       4859

Practice
  456                 444            563      4556        3460
- 348               -188           -182    - 3662      -1228