题目内容
比较下列各组数的大小.
(1)-
与-0.76;
(2)-
与-
;
(3)-3
与-3
;
(4)-|-3.5|与-[-(-3.5)].
(1)-
| 3 |
| 4 |
(2)-
| 3 |
| 10 |
| 3 |
| 11 |
(3)-3
| 1 |
| 3 |
| 3 |
| 10 |
(4)-|-3.5|与-[-(-3.5)].
(1)∵-
=-0.75,则|-
|<|-0.76|,
∴-
>-0.76;
(2)∵-
=-
,-
=-
,则|-
|>|-
|,
∴-
<-
;
(3)∵-3
=-
,-3
=-
,则|-3
|>|-3
|,
∴-3
<-3
;
(4)-|-3.5|=-3.5,-[-(-3.5)]=-3.5,
∴-|-3.5|=-[-(-3.5)].
| 3 |
| 4 |
| 3 |
| 4 |
∴-
| 3 |
| 4 |
(2)∵-
| 3 |
| 10 |
| 33 |
| 110 |
| 3 |
| 11 |
| 30 |
| 110 |
| 3 |
| 10 |
| 3 |
| 11 |
∴-
| 3 |
| 10 |
| 3 |
| 11 |
(3)∵-3
| 1 |
| 3 |
| 100 |
| 30 |
| 3 |
| 10 |
| 99 |
| 30 |
| 1 |
| 3 |
| 3 |
| 10 |
∴-3
| 1 |
| 3 |
| 3 |
| 10 |
(4)-|-3.5|=-3.5,-[-(-3.5)]=-3.5,
∴-|-3.5|=-[-(-3.5)].
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