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

4/7X[3/4÷(7/16-1/4)]
=4/7X(3/4÷3/16)
=4/7X3/4X16/3
=16/7