14/25×12+7/25×14+42/25×2 简便运算
问题描述:
14/25×12+7/25×14+42/25×2 简便运算
答
提出14/25,即14/25乘以(12+7+6)得数14
答
14/25×12+7/25×14+42/25×2
=12×14/25+7×14/25+6×14/25
=(12+7+6)×14/25
=25×14/25
=14