题目内容
计算:
(1)a
-2a2
+3
(2)2
-
÷(2
×
)
(1)a
| 8a |
|
| 2a3 |
(2)2
| 1 |
| 2 |
| 24 |
| 4 |
| 3 |
| 18 |
| 8 |
| 1 |
| 3 |
| 54 |
(1)原式=2a
-
+3a
=
a
;
(2)原式=
×2
-
×
=5
-2×
=5
-
=-
.
| 2a |
a
| ||
| 2 |
| 2a |
| 9 |
| 2 |
| 2a |
(2)原式=
| 5 |
| 2 |
| 6 |
| 4 |
| 3 |
| 3 |
| 2 |
|
| 6 |
| ||
| 12 |
| 6 |
| ||
| 6 |
| 29 |
| 6 |
| 6 |
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