[1又2/3-(1/3-1/6+5/12)*2.4]/5=[5/3-7/12*12/5]/5=(5/3-7/5)/5=4/15/5=4/75(-3)的2次方-(1又1/2)的3次方*2/9-6/|-2/3|的3次方=9-27/8*2/9-6/(8/27)=9-3/4-81/4=9-21=-13
5/3-(2/12+5/12)*24/5 /5=5/3-
4/75-720-3/4
663322114458575
天才,9-21=﹣13?? 1、4/75 2、﹣12