(5+1/5÷7/15)×3/28计算,有简便方法吗
问题描述:
(5+1/5÷7/15)×3/28计算,有简便方法吗
答
(5+1/5÷7/15)×3/28
=(5+1/5×15/7)×3/28
=(5+3/7)×3/28
=38/7×3/28
=19/7×3/14
=57/98
没有简便得了