(-123/2)/1.4-(83/1)/(1.4)

日期:2021-11-06 11:14:19 人气:1

(-123/2)/1.4-(83/1)/(1.4)

(-12又3分之2)/1.4-(-8又3分之1)/(-1.4)+20又3分之1/1.4
=(-12又3分之2+8又3分之1+20又3分之1)/1.4
=16/1.4
=80/7
    A+
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