SUBTRACTING:
If you are comfort with complements, then continue with subtractions. In subtractions if the upper digit is bigger than the lower digit we can simply subtract and there is no problem. But if the upper digit is smaller than lower digit , we have to borrow and carry over which leads to several mistakes. But in vedic math no need to borrow and carry over. Just to follow the sutra
" All from 9 and last from 10"
Whenever upper digit is smaller than the lower digit, first we have to find out their difference and then their complement.
ex. 723-246
723 1. In the last column, the upper digit 3 is smaller than the -246 lower digit 6. So first we take the difference of the ------ two digits
7 6-3=3
Now find the complement of the difference ,3. As this is the first time we are using the complement we have to take it from 10.
10 - 3 = 7
723 2. again 2 < 4. So we take the difference of the two digits.
-246 4 - 2 = 2
------ Now the complement of 2
77 9 - 2 = 7
(As we are using the complement for the second time we have to use 9)
723 3. 7 > 2 . So we come out of the complement and subtract -246 normally.
------- 7 - 2 = 5
477 Now subtract 1 extra in this column for complements.
5 - 1 = 4
(Whenever we come out of the complement we have to subtract 1 extra)
723 - 246 = 477
ex. 624 - 275
624 5 - 4 = 1; 10 - 1 = 9
-275 7 - 2 = 5; 9 - 5 = 4
------ 6 - 2 = 4; 4 - 1 = 3
349
624 - 275 = 349
Practice few more examples to make perfect yourself:
3726 81364 412 924 742
-1987 - 27986 -179 -868 -297
---------- -------- ------- ------- -------
1739 53378 233 56 445
---------- --------- ------- -------- -------
952 1000 6213 9821 72103
- 174 - 873 -1696 -4982 -27984
--------- ------- --------- -------- ---------
778 127 4517 4839 44119
--------- -------- --------- --------- ---------
2564 9313 83104
-1697 -7954 -36536
------- -------- ---------
867 1359 46568
------- -------- ----------
Depending upon the value of the digits there is little variation in solving the problem. In the next posting we will learn if the upper digit is sometimes bigger and sometimes smaller than the lower digit.
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