4分之3乘以5分之1加4分之3乘以5分之2加0.75乘以5分之3减4分之3

问题描述:

4分之3乘以5分之1加4分之3乘以5分之2加0.75乘以5分之3减4分之3

4分之3乘以5分之1加4分之3乘以5分之2加0.75乘以5分之3减4分之3
=3/4×(1/5+2/5+3/5-1)
=3/4×1/5
=3/20