75-3/16]x[2/9+1/3]
问题描述：
75-3/16]x[2/9+1/3]
答
( ):6=0.75
答
原式=（3/4-3/16）*（2/9+1/3）
=9/16*5/9
=5/16
答
[0.75-3/16]x[2/9+1/3)
3/4x5/9-3/16x5/9
=5/12-5/48
=5/16