题目内容
计算:
(1)4
-7
+2
(2)(
-
)2+(
+
)(
-
)
(1)4
3 |
12 |
48 |
(2)(
3 |
2 |
3 |
2 |
3 |
2 |
(1)原式=4
-14
+8
=-2
;
(2)原式=3-2
+2+3-2
=6-2
.
3 |
3 |
3 |
=-2
3 |
(2)原式=3-2
6 |
=6-2
6 |
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题目内容
3 |
12 |
48 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
3 |
3 |
3 |
6 |
6 |