题目内容
(-
)×(-
)÷(-
)．
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（-
）×（-
）÷（-
）
=（-
）×（-
）×（-
）
=-
×
×
=-
．
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| 4 |
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| 2 |
| 9 |
| 4 |
=（-
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| 4 |
| 1 |
| 2 |
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=-
| 3 |
| 4 |
| 1 |
| 2 |
| 4 |
| 9 |
=-
| 1 |
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