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Racy Subtraction

RACY SUBTRACTION 
  78890765326
-66569999996 
----------------------=12320165330
123
     3 ( 0-9=-9)
      20(10-9)next no.is 7-9
          165330
Same method as Racy Addition but instead of adding 1 when the next no. Is a big number subtracted from small (3-9=-6) subtract 1 from the previous number .


  75899764333679
- 58843213489008
____________________
 16956550844671

POWER 10 SUBTRACTION 
If there are zero in above no. Subtract all zero from 9 and the last one from 10.
Example
  63000000
-49784200
____________=13215800
13
    (9-7=2)
    (9-8=1)
     (9-4=5)
     (10-2=8)
     00

   40000005
-29747898
___________
10252107

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