题目内容
计算或化简:
(1)
-
+3
;
(2)
÷
-
×
+
;
(3)(
+
)(
-
)-(
-
)2;
(4)a
-2a2
+3
.
(1)
18 |
50 |
8 |
(2)
24 |
3 |
|
18 |
32 |
(3)(
5 |
2 |
5 |
2 |
3 |
2 |
(4)a
8a |
|
2a3 |
(1)原式=3
-5
+6
=4
;
(2)原式=
-
+4
=2
-3+4
=6
-3;
(3)原式=5-2-(3-2
+2)=3-3+2
-2=2
-2;
(4)原式=2a
-
+3a
=
.
2 |
2 |
2 |
2 |
(2)原式=
24÷3 |
|
2 |
2 |
2 |
2 |
(3)原式=5-2-(3-2
6 |
6 |
6 |
(4)原式=2a
2a |
a
| ||
2 |
2a |
9a
| ||
2 |
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