简便运算:1/3*4.5/(0.75+5/4)
问题描述:
简便运算:1/3*4.5/(0.75+5/4)
答
1/3*4.5/(0.75+5/4)
=1/3*4.5/(3/4+5/4)
=1/3*4.5/2
=1/3*3*1.5/2
=1.5/2
=(3/2)/2
=3/2*1/2
=3/4