简便运算：1/3*4.5/(0.75+5/4)_数学解答

简便运算：1/3*4.5/(0.75+5/4)

人气：465 ℃　时间：2020-02-05 20:45:50

解答

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