题目内容
计算:
(1)
+
-
(2)
-
(3)
-
+
(4)(
-
)÷(
-
).
(1)
| 18 |
| 72 |
| 32 |
(2)
| 4x |
| 9x |
(3)
| 27 |
| 12 |
|
(4)(
| 12 |
| 8 |
| 48 |
| 32 |
(1)原式=3
+6
-4
=5
;
(2)原式=2
-3
=-
;
(3)原式=3
-2
+
=
;
(4)原式=(2
-2
)÷(4
-4
)=
.
| 2 |
| 2 |
| 2 |
| 2 |
(2)原式=2
| x |
| x |
| x |
(3)原式=3
| 3 |
| 3 |
2
| ||
| 3 |
5
| ||
| 3 |
(4)原式=(2
| 3 |
| 2 |
| 3 |
| 2 |
| 1 |
| 2 |
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