题目内容
计算下列各式
(1)
×
(2)
(3)
(4)
×
.
(1)
| 75 |
| 3 |
(2)
|
(3)
| ||
|
(4)
1
|
|
(1)原式=5
×
=15;
(2)原式=
=
=
;
(3)原式=
=4;
(4)原式=
=
=
.
| 3 |
| 3 |
(2)原式=
|
|
| ||
| 2 |
(3)原式=
4
| ||
|
(4)原式=
|
| 5 | ||
9
|
5
| ||
| 18 |
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