1、-0.288(十进制数)=-0.0100001(二进制数)
49(十进制数)=00110001(二进制数)
[-0.288]原=1.0100001 [-0.288]反=1.1011110 [-0.288]补=1.1011111
[49]原=00110001 [49]反=00110001 [49]补=00110001
2、[X]原=0.1101000 [X]补=0.1101000
[Y]原=1.0111000 [Y]补=1.1001000 (8位)
[X+Y]补=[X]补+ [Y]补=0.1101000+1.1001000 =0.0110000