(1+0.21+0.32)*(0.21+0.32+0.43)-(1+0.21+0.32+0.43)*(0.21+0.32
3个回答

(1+0.21+0.32)*(0.21+0.32+0.43)-(1+0.21+0.32)*(0.21+0.32)-0.43*(0.21+0.32)

=(1+0.21+0.32)*(0.21+0.32+0.43-0.21+0.32)-0.43*(0.21+0.32)

=(1+0.21+0.32)*0.43-0.43*(0.21+0.32)

=0.43*(1+0.21+0.32-0.21-0.32)

=0.43