3⼀4乘18加1⼀4乘六的简便方法

2025-06-21 23:49:33
推荐回答(1个)
回答1:

3/4乘18加1/4乘六的简便方法
=3/4x12+3/4x6+1/4x6
=3x3+6x(3/4+1/4)
=9+6
=15