3又3/4×73.5-3.75×57.3+16.2×6又1/4
=3.75X(73.5-57.3)+16.2x6又1/4
=3.75X16.2+16.2x6又1/4
=16.2x(3.75+6又1/4)
=16.2X10
=162验算了吗？对的？对