[(2.74-0.56)*(29/12-79/60+2.275)]/(20/17)
问题描述：
[(2.74-0.56)*(29/12-79/60+2.275)]/(20/17)
答
=2.18*(145/60-79/60+2.275)*(17/20)
=2.18*(66/60+2.275)*17/20
=2.18*(1.1+2.275)*17/20
=2.18*3.375*17/20
=6.253875