题目内容
计算.
(1)2
+3
-4
(2)
•(
-
)
(1)2
| 12 |
| 48 |
| 75 |
(2)
| 4x |
|
|
(1)原式=4
+12
-20
=16
-20
=-4
;
(2)原式=2
•(
-
)=2
•
=2
•
=
.
| 3 |
| 3 |
| 3 |
| 3 |
| 3 |
| 3 |
(2)原式=2
| x |
| ||
| 2 |
| ||
| 6 |
| x |
3
| ||||
| 6 |
| x |
| ||
| 3 |
2
| ||
| 3 |
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