15分之14乘以7的简便方法怎么计算
问题描述:
15分之14乘以7的简便方法怎么计算
答
14/15*7
=2*7*7/15
=2*49/15
=98/15
=(90+8)/15
=90/15+8/15
=6+8/15
=6又15分之8