题目内容
计算:(
)-2-(
-π)0-4cos45°-(
-1)2.
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(
)-2-(
-π)0-4cos45°-(
-1)2,
=
-1-4×
-(2+1-2
),
=9-1-2
-3+2
,
=5.
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=
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(
|
| ||
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=9-1-2
| 2 |
| 2 |
=5.
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