赚现金
计算: ( π - 1 ) 0 + | - 2 | = .
计算: 1 2021 - 8 3 + ( π - 3 . 14 ) 0 - ( - 1 5 ) - 1 .
计算: | 3 | - ( π - 1 ) 0 = .
计算:
(1) ( − 2 ) 2 × | − 3 | − ( 6 ) 0
(2) ( x + 1 ) 2 − ( x 2 − x )
(1)计算: ( 2020 ) 0 - 4 + | - 3 | ;
(2)化简: ( a + 2 ) ( a - 2 ) - a ( a + 1 ) .
计算: 8 + | 2 - 1 | .
(1)计算: 8 - 4 cos 45 ° + ( - 1 ) 2020 .
(2)化简: ( x + y ) 2 - x ( x + 2 y ) .
计算: 9 - 1 = .
(1)计算: 4 - | - 2 | + ( 6 ) 0 - ( - 1 ) .
(2)化简: ( x - 1 ) 2 - x ( x + 7 ) .
计算: ( − 2 ) 2 − ( π − 7 ) 0 + | 3 − 2 | + 2 sin 60 ° .
(1)计算: π 0 + 2 cos 30 ° − | 2 − 3 | − ( 1 2 ) − 2 ;
(2)化简: ( 2 − x − 1 x + 1 ) ÷ x 2 + 6 x + 9 x 2 − 1 .
(1)计算: 27 + ( 2 cos 60 ° ) 2020 - ( 1 2 ) - 2 - | 3 + 2 3 | ;
(2)先化简,再求值: ( x - 2 xy - y 2 x ) ÷ x 2 - y 2 x 2 + xy ,其中 x = 2 + 1 , y = 2 .
计算: ( 1 5 ) - 1 - 4 = .
(1)计算: 4 × ( - 3 ) + | - 8 | - 9 + ( 7 ) 0 .
(2)化简: ( a - 5 ) 2 + 1 2 a ( 2 a + 8 ) .
(1)计算: ( 1 2 ) - 2 + ( 3 . 14 - π ) 0 + | 3 - 12 | - 4 sin 60 ° .
(2)先化简,再求值: ( 1 x - 1 - x + 1 ) ÷ x - 2 x 2 - 1 ,其中 x = 2 - 1 .
试题篮