简便计算.(11又3/5-2又1/4-3又3/4+2/5)*(9-4/9)

问题描述:

简便计算.(11又3/5-2又1/4-3又3/4+2/5)*(9-4/9)

(11又3/5-2又1/4-3又3/4+2/5)*(9-4/9)
={11又3/5+2/5-[2又1/4+3又3/4]}*[9-4/9)
=6*(9-4/9)
=154/3