|-2又1⼀2|一(-2.5)十1一|1一2又1⼀2|

2025-03-01 20:27:25
推荐回答(3个)
回答1:

|-2又1/2|一(-2.5)+1一|1一2又1/2|
=2又1/2+2.5+1一|-1又1/2|
=2.5+2.5+1一1.5
=4.5

回答2:

=2.5+2.5+1-1.5
=4.5

回答3:

4.5