4/7×[0.75÷(7/16减0.25)]怎么巧算
问题描述:
4/7×[0.75÷(7/16减0.25)]怎么巧算
答
4/7X[3/4÷(7/16-1/4)]
=4/7X(3/4÷3/16)
=4/7X3/4X16/3
=16/7