SUBTRACTION
A DECREASE IN GIVEN NUMBER IS CALLED SUBRACTION.
GO BACKWARDS FROM GIVEN NUMBER
5-1= 3-1= 2-1= 1-1=
9-1= 7-2= 6-3= 4-1=
6-3= 5-3= 4-1= 5-4=
3-2= 4-0= 4-2= 6-5=
9-6= 9-2= 9-4= 8-5=
7-6= 5-1= 3-0= 9-8=
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