题目内容
计算:
(1)
×
×(-
)×(-
)
(2)
÷(-
)×2
.
(1)
| 18 |
| 20 |
| 6 |
| 75 |
(2)
1
|
|
| 8 |
(1)原式=3
×2
×
×5
=30×
×
×
×
×
=180
;
(2)原式=-
×4
=-
×4
=-8.
| 2 |
| 5 |
| 6 |
| 3 |
=30×
| 5 |
| 2 |
| 2 |
| 3 |
| 3 |
=180
| 5 |
(2)原式=-
|
| 2 |
=-
| 2 |
| 2 |
=-8.
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