题目内容
计算:(
+
+
+
)-(
+
+
+
)+(
+
+
+
)-(
+
+
+
)=______.
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| 12 |
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(
+
+
+
)-(
+
+
+
)+(
+
+
+
)+(
+
+
+
)
=
×(1+
+
+
)-
×(1+
+
+
)+
×(1+
+
+
)-
×(1+
+
+
),
=(1+
+
+
)×(
-
+
-
),
=
×
,
=
.
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| 2 |
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| 1 |
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| 3 |
| 1 |
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| 9 |
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| 12 |
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| 12 |
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| 10 |
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| 15 |
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| 20 |
=
| 1 |
| 2 |
| 1 |
| 2 |
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| 3 |
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| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
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| 4 |
| 1 |
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=(1+
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=
| 25 |
| 12 |
| 13 |
| 60 |
=
| 65 |
| 144 |
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