题目内容
计算:
(1)
-3
+
(2)
(
+3
-
).
(1)
32 |
|
2 |
(2)
12 |
75 |
|
48 |
(1)原式=4
-
+
=
;
(2)原式=2
×(5
+
-4
)
=2
×2
=12.
2 |
3
| ||
2 |
2 |
=
7
| ||
2 |
(2)原式=2
3 |
3 |
3 |
3 |
=2
3 |
3 |
=12.
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题目内容
32 |
|
2 |
12 |
75 |
|
48 |
2 |
3
| ||
2 |
2 |
7
| ||
2 |
3 |
3 |
3 |
3 |
3 |
3 |