0.75*9+(8/9)+(3/4)*1+(1/9)-75%
问题描述：
0.75*9+(8/9)+(3/4)*1+(1/9)-75%
要简便的过程
输错了，是0.75*9又（8/9）+（3/4）*1又（1/9）-75%
答
0.75*9+(8/9)+(3/4)*1+(1/9)-75%
=0.75*9+(8/9)+0.75+(1/9)-0.75
=0.75*(9+1-1)+(8/9+1/9)
=0.75*9+1
=7.75