比较大小①5-12 58②3+5 8.
比较大小①
______
②
+
______
(填“>”“=”“<”).在线课程①∵
=
-
,
=
-
,
∵
=
,
=
∴
<
;
②∵(
+
)2=8+2
,(
)2=8,
∴
+
>
.
故填空答案:①<;②>.
| ||
2 |
5 |
8 |
②
3 |
5 |
8 |
| ||
2 |
| ||
2 |
1 |
2 |
5 |
8 |
9 |
8 |
1 |
2 |
∵
| ||
2 |
| ||
8 |
9 |
8 |
| ||
8 |
∴
| ||
2 |
5 |
8 |
②∵(
3 |
5 |
15 |
8 |
∴
3 |
5 |
8 |
故填空答案:①<;②>.