题目内容
计算:[(11+
+
)-(12+
+
)]÷[(11-
-
)-(12-
-
)]=______.
| 1 |
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| 1 |
| 7 |
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| 9 |
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| 9 |
原式=[11+
+
-12-
-
]÷[11-
-
-12+
+
],
=(-
+
-
)÷(-
-
-
),
=-
÷(-
),
=
.
故此题应该填
.
| 1 |
| 4 |
| 1 |
| 7 |
| 2 |
| 3 |
| 2 |
| 9 |
| 3 |
| 4 |
| 3 |
| 7 |
| 2 |
| 3 |
| 2 |
| 9 |
=(-
| 3 |
| 4 |
| 1 |
| 7 |
| 8 |
| 9 |
| 3 |
| 4 |
| 3 |
| 7 |
| 1 |
| 9 |
=-
| 377 |
| 252 |
| 325 |
| 252 |
=
| 377 |
| 325 |
故此题应该填
| 377 |
| 325 |
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