(1/2+1/3+1/4+1/6)*24

问题描述:

(1/2+1/3+1/4+1/6)*24

(1/2+1/3+1/4+1/6)*24
=1/2*24+1/3*24+1/4*24+1/6*24
=12+8+6+4
=30