41又1/3*3/4+51又1/4*4/5+61又1/5*5/6 算好,過了3分中后關閉·····

41又1/3*3/4+51又1/4*4/5+61又1/5*5/6 算好,過了3分中后關閉·····

41又1/3*3/4+51又1/4*4/5+61又1/5*5/6
=124/4+205/5+306/6
=31+41+51
=123