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+// page no 623
+// example no A.2
+// SUBTRACTION OF TWO NUMBERS
+clc;
+printf('Minuend: 52 \n');
+printf('Subtrahend: 23 \n \n')
+printf('BORROW METHOD \n \n');
+
+m=5*10+2; // minuend
+s=2*10+3; // subtrahend
+// to subtract 3 from 2, 10 must be borrowed from the second place of the minuend.
+
+m=4*10+12;
+
+sub=m-s;
+printf('Subtraction= ')
+disp(sub);
+
+printf('\n \n 10s COMPLEMENT METHOD \n \n');
+
+// 9's complement of 23 is
+
+n=99-23;
+// add 1 to the 9's complement to find the 10's complement
+t=n+1;
+// add the 10's complement of the subtrahend(23) to minuend(52) to subtract 23 from 52
+a=m+t;
+// subtract 100 from a to compensate for the 100 that was added to find the 10's complement of 23
+sub=a-100;
+printf('Subtraction= ');
+disp(sub);