问题
解答题
比较大小 (1)-3与-4 (2)
(3)-
(4)-(+3.5)与-|-
|
答案
(1)∵|-3|=3,|-4|=4,
∴-3>-4;
(2)
>-2 3
;3 4
(3)∵|-
|=5 6
=5 6
,|-35 42
|=6 7
=6 7
,36 42
∴-
>-5 6
;6 7
(4)∵-(+3.5)=-3.5=-
=-7 2
,-|-21 6
|=-11 3
=-11 3
,22 6
又∵|-
|=21 6
,|-21 6
|=22 6
,22 6
∴-(+3.5)>-|-
|.11 3