题目内容
计算:
(1)
÷
(2)
÷
(3)
÷
×
(4)2
÷
×
.
(1)
|
|
(2)
xy |
|
(3)
1
|
2
|
1
|
(4)2
12 |
1 |
2 |
50 |
1 |
2 |
|
(1)原式=
=
=
;
(2)原式=
=
=|x|;
(3)原式=
=
=
;
(4)原式=4
÷
×
=
×
=
.
|
|
1 |
8 |
(2)原式=
xy÷
|
x2 |
(3)原式=
|
|
2
| ||
5 |
(4)原式=4
3 |
5 |
2 |
2 |
1 |
4 |
3 |
2 |
5 |
3
| ||
2 |
3
| ||
5 |
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