5⼀9乘3⼀7除5⼀9乘3⼀7简便计算

2025-03-11 04:48:55
推荐回答(1个)
回答1:

5/9×3/7÷5/9×3/7
=(5/9÷5/9)×(3/7×3/7)
=1×9/49
=9/49