题目内容
计算
(1)
÷
×4
(2)
x•
-x3
+6x•
.
(1)
3
|
| 2 |
| 5 |
2
|
1
|
(2)
| 2 |
| 3 |
| 9x |
|
|
(1)原式=
÷
×4
=1×
×4×
=10
;
(2)原式=
x•3
-x3•
+6x•
=2x
-x
+3x
=4x
.
|
| 2 |
| 5 |
|
|
=1×
| 5 |
| 2 |
|
=10
| 2 |
(2)原式=
| 2 |
| 3 |
| x |
| ||
| x2 |
| ||
| 2 |
=2x
| x |
| x |
| x |
=4x
| x |
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