(2⼀3+1⼀5)÷39⼀5x9⼀7简便运算。

2024-12-18 23:08:49
推荐回答(2个)
回答1:


回答2:

(2/3+1/5)÷39/5x9/7简便运算。
=13/15x5/39x9/7
=1/9x9/7
=1/7