15之8+3分之2-4分之3等于

问题描述:

15之8+3分之2-4分之3等于

15之8+3分之2-4分之3等于
解,得:
==8/15+2/3-3/4
==18/15-3/4
==72/60-45/60
==27/60
==9/20