00111 + 10111
11101 - 00101
111 - 010
10101 - 01111
10101 + 00001
10100 - 10000
11011 + 00111
010101 + 101011
10111 + 10001
1101 + 1000
= 10110
= 10101
= 101000
= 11110
= 1000000
= 110
= 11000
101
=100010
= 100
