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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