题目内容
计算：(-2
)-1×(-
)-2+(-
)-2×(-
)0．
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原式=-
×
+
×1
=-
+
=
．
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| 49 |
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=-
| 7 |
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| 27 |
| 12 |
=
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| 3 |
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| 1 |
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| 49 |
| 36 |
| 9 |
| 4 |
| 7 |
| 12 |
| 27 |
| 12 |
| 5 |
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