比较下列各组数的大小.(1)?23与?34; (2)|-(2.1)|与-(-2.1); (3)-3.2与?318.

2025-02-24 04:35:54
推荐回答(1个)
回答1:

(1)∵|?
2
3
|=
2
3
8
12
|?
3
4
|=
3
4
9
12
8
12
9
12

?
2
3
>?
3
4


(2)∵|-(+2.1)|=2.1,-(-2.1)=2.1,
∴|-(+2.1)|=-(-2.1);

(3)∵|-3.2|=3.2,|?3
1
8
|=3
1
8
=3.125
,3.2>3.125,
?3.2<?3
1
8