题目内容
计算:
(1)2
•(3
-4
-3
)
(2)
+
-4
(1)2
| 12 |
| 48 |
|
| 27 |
(2)
| 2 | ||
|
| 18 |
|
(1)2
•(3
-4
-3
)
=4
•(12
-
-9
)
=4
•(3
-
)
=36-4
;
(2)
+
-4
=2(
+1)+3
-2
=2+3
.
| 12 |
| 48 |
|
| 27 |
=4
| 3 |
| 3 |
| 2 |
| 3 |
=4
| 3 |
| 3 |
| 2 |
=36-4
| 6 |
(2)
| 2 | ||
|
| 18 |
|
=2(
| 2 |
| 2 |
| 2 |
=2+3
| 2 |
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