简便计算2⼀9÷[5⼀6*(4⼀5-2⼀3)]

2025-04-28 22:43:08
推荐回答(1个)
回答1:

=2/9÷(5/6x4/5-5/6x2/3)
=2/9÷(2/3-5/9)
=2/9÷2/3-2/9÷5/9
=2/9x3/2-2/9x9/5
=1/3-2/5
=5/15-6/15
=-(1/15)