问题:
(1)解方程:
x+3y=-1
3x-2y=8
(2)计算:
4
9
+
3
1
27
-
1
9
16
×
3
-
64
125
.
(1)解方程:
(2)计算:
+
-
×
.
|
(2)计算:
|
3 |
|
||
1
|
3 | -
|
||
参考答案: