Using the 2's complement system?

Question

subtract %00111010 from %01010111

I am getting 11100011 is this correct?

here is another one

add %00000010 + %00000111

Getting 00001001

is this correct?

Thanks for the help!!!

Answer 1

the second one is correct!

1) 0101 0111 - 0011 1010 = 0001 1101;

no complement is required;