题目内容
计算:
(1)2
-6
(2)
+
(3)
+6
(4)
-
(1)2
| 7 |
| 7 |
(2)
| 50 |
| 32 |
(3)
| 12 |
|
(4)
| 2x |
| 8x |
(1)原式=-4
;
(2)原式=5
+4
=9
;
(3)原式=2
+2
=4
.
(4)原式=
-2
=-
.
| 7 |
(2)原式=5
| 2 |
| 2 |
| 2 |
(3)原式=2
| 3 |
| 3 |
| 3 |
(4)原式=
| 2x |
| 2x |
| 2x |
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