2⼀7+括号3⼀4+5⼀7回括等于多少要过程?

2024-12-02 09:17:43
推荐回答(2个)
回答1:

答:等于1.75
解:2/7+(3/4+5/7)
=2/7+5/7+3/4
=7/7+3/4
=1+3/4
=7/4
=1.75

回答2:

2/7+(3/4+5/7)
=2/7+3/4+5/7
=(2/7+5/7)+3/4
=7/7+3/4
=1+3/4
=1又3/4