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计算: | - 2 | + ( 3 - 1 ) 0 + 1 2 - 1 - 2 cos 45 ∘ .
计算: ( 1 3 ) - 1 - 12 + 2 tan 60 ° - ( 2 - 3 ) 0 .
计算: 8 3 - ( 3 - π ) 0 - | - 3 + 2 |
计算: ( - 2 ) 2 + 2 cos 60 ∘ - ( 10 - π ) 0 .
计算: ( π - 10 ) 0 + | 2 - 1 | + 1 2 - 1 - 2 sin 45 ∘ .
计算: 2016 0 + 2 1 - sin 30 ∘ - 1 3 - 1 + 16 .
计算: - 1 4 + 12 sin 60 ∘ + 1 2 - 2 - ( π - 5 ) 0 .
计算: 1 2 - 3 - 4 tan 45 ∘ + | 1 - 12 | = .
计算 ( 2 + 1 ) 2 - π 0 - 1 - 2
计算: 9 + | - 4 | + 2 sin 30 ∘ - 3 2 .
(1)计算: - 1 4 + 12 sin 60 ∘ + ( 1 2 ) - 2 - ( π - 5 ) 0
(2)先化简,再求值: ( 1 - 1 x + 2 ) ÷ x 2 + 2 x + 1 x + 2 ,其中 x = 3 - 1 . .
计算: 12 - 3 tan 30 ∘ + ( π - 4 ) 0 - 1 2 - 1 .
计算:
(1) ( 2 - 3 ) 0 + - 1 2 - 2 - | - 2 | - 2 cos 60 ∘ .
(2)解方程:2x2﹣4x﹣1=0.
计算:2019 0+( 1 3 ) ﹣ 1= .
计算: 9 ﹣2cos60°+( 1 8 ) ﹣ 1+(π﹣3.14) 0
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