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计算: 2021 0 + 3 - 1 ⋅ 9 - 2 sin 45 ° .
计算: 2 cos 45 ° + ( 1 3 ) - 1 - | - 3 | .
计算: 12 + | 3 - 3 | - ( 1 3 ) - 1 .
计算: 2 sin 60 ° + 12 + | - 5 | - ( π + 2 ) 0 .
计算 (1) (2) (3) (4) -
(本小题满分6分)计算:-(3.14-)0+(1-cos30°)×()-2
计算:
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