比较大小:(1)5-12与0.5,(2)-5+1与-22.
比较大小:
(1)
与0.5;
(2)-
+1与-
.在线课程(1)∵0.5=
=
,
>2,
∴
>0.5;
(2)∵-
+1=-(
-1)=-
,2
-2=
(
-1)>
,
∴-
+1<-
.
(1)
| ||
2 |
(2)-
5 |
| ||
2 |
1 |
2 |
2-1 |
2 |
5 |
∴
| ||
2 |
(2)∵-
5 |
5 |
2
| ||
2 |
5 |
2 |
10 |
2 |
∴-
5 |
| ||
2 |