[x]补=10+x=1.10000[-x]补=0.01111[y]补=0.1101[-y]=1.00110x+y=1.01111+0.11001=0.01000x-y=1.01111+1.11001=1.010[x]补=10+x=1.10000[-x]补=0.01111[y]补=0.1101[-y]=1.00110x+y=1.01111+0.11001=0.01000x-y=1.01111+1.11001=1.01000