题目内容
计算下列各题.
(1)(
+6
-
)÷
;
(2)6
+
-a
.
(1)(
72 |
|
50 |
8 |
(2)6
|
1 |
2 |
4a |
|
(1)原式=(6
+3
-5
)÷2
=4
÷2
=2;
(2)原式=2
+
-
=2
.
2 |
2 |
2 |
2 |
=4
2 |
2 |
=2;
(2)原式=2
a |
a |
a |
=2
a |
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题目内容
72 |
|
50 |
8 |
|
1 |
2 |
4a |
|
2 |
2 |
2 |
2 |
2 |
2 |
a |
a |
a |
a |