2/3+1/4+2/15+1/12+2/35+1/24+2/63+1/40
问题描述:
2/3+1/4+2/15+1/12+2/35+1/24+2/63+1/40
怎么算啊
答
1680/2520+630/2520+336/2520+210/2520+114/2520+105/2520+80/2520+63/2520
=3218/2520
=1609/1260