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计算: ( 2 - 2 ) 0 + ( - 1 2 ) - 2 + 2 sin 45 ° - 8 .
计算: | - 5 | - ( π - 2020 ) 0 + 2 cos 60 ° + ( 1 3 ) - 1 .
计算: | - 2 | - 2 cos 60 ° + ( π - 2020 ) 0 .
(1)计算: 12 - 4 sin 60 ° + ( 2020 - π ) 0 .
(2)解不等式组: x + 2 > - 1 , 2 x - 1 3 ⩽ 3 ·
计算: ( - 2 ) - 2 - | 3 - 2 | + ( - 3 2 ) 0 - 8 3 - 2 cos 30 ° .
(1)计算: 2 sin 60 ° + ( 1 2 ) - 2 + | 2 - 3 | - 9 ;
(2)解不等式组: 4 x - 1 ⩾ x + 2 , ① 2 x + 1 3 > x - 1 ⋅ ② .
计算: 8 3 - ( 3 - π ) 0 - | - 3 + 2 |
计算: ( - 2 ) 2 + 2 cos 60 ∘ - ( 10 - π ) 0 .
计算: 9 + | - 4 | + 2 sin 30 ∘ - 3 2 .
(1)计算: | 1 - 3 | + 3 tan 30 ∘ - ( 3 - 5 ) 0 - - 1 3 - 1 .
(2)解不等式组 2 x + 1 > 0 ① 2 - x 2 ≥ x + 3 3 ② .
计算: | 2 - 3 | - 16 + 1 3 0 .
计算: | - 7 | - ( 1 - π ) 0 + 1 3 - 1 .
计算: | 2 - 2 | - 2 cos 45 ∘ + ( - 1 ) - 2 + 8 .
(1)计算: 1 2 - 1 - 27 - ( π - 2016 ) 0 + 9 tan 30 ∘ ;
(2)解分式方程: x - 3 x - 2 + 1 = 3 x - 2 .
试题篮