估算比较大小:(1)-10 -3.2,(2)3130 5,(3)6-12 2+12,(4)3-12 12.
估算比较大小:
(1)-
______-3.2;
(2)
______5;
(3)
______
;
(4)
______
(填“>”或“<”).在线课程(1)∵-3.2=-
,10<1024,
∴-
>-
;
(2)∵5=
,130>125,
∴
>5;
(3)∵
-1<
+1,
∴
<
;
(4)∵
-1<1,
∴
<
.
故填空答案:(1)>(2)>(3)<(4)<.
(1)-
10 |
(2)
3 | 130 |
(3)
| ||
2 |
| ||
2 |
(4)
| ||
2 |
1 |
2 |
10.24 |
10.24 |
10.24 |
∴-
10 |
10.24 |
(2)∵5=
3 | 125 |
∴
3 | 130 |
(3)∵
6 |
2 |
∴
| ||
2 |
| ||
2 |
(4)∵
3 |
∴
| ||
2 |
1 |
2 |
故填空答案:(1)>(2)>(3)<(4)<.