5分之3*【10分之3-15分之2】+8分之3
问题描述:
5分之3*【10分之3-15分之2】+8分之3
答
3/5X(3/10-2/15)+3/8 =3/5X3/10-3/5X2/15+3/8 =9/50-6/75+3/8 =27/150-12/150+3/8 =15/150+3/8 =4/40+15/40 =19/40
5分之3*【10分之3-15分之2】+8分之3
3/5X(3/10-2/15)+3/8 =3/5X3/10-3/5X2/15+3/8 =9/50-6/75+3/8 =27/150-12/150+3/8 =15/150+3/8 =4/40+15/40 =19/40