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计算: 9 ﹣2cos60°+( 1 8 ) ﹣ 1+(π﹣3.14) 0
计算:|﹣2|﹣2018 0+( 1 2 ) ﹣ 1
计算:( 1 2 ) ﹣ 1﹣2sin45°+|﹣ 2 |+(2018﹣π) 0.
计算: 1 2 ﹣| 2 ﹣2|+(1﹣cos45°)+(﹣ 1 3 ) ﹣ 2.
计算: - 1 4 - | 3 - 1 | + ( 2 - 1 . 414 ) 0 + 2 sin 60 ∘ - - 1 2 - 1
计算
(1)计算 1 1 2 ÷ - 3 4 + 3 × 12 - 1 1 - 3 - 2
(2)先化简,再求值: 5 x + 3 y x 2 - y 2 + 2 x y 2 - x 2 ÷ x 3 ( x - y ) ,其中 x=3 3 , y= 1 2 .
先化简,再求值: a 2 - 2 a + 1 a 2 - 4 ÷ a - 1 a - 2 + 1 a + 2 ,其中 a=|﹣1﹣ 3 |﹣tan60°+( 1 2 ) ﹣ 1.
计算:(﹣ 1 2 ) ﹣ 2﹣ 27 3 ﹣(﹣2) 0+ 3 tan30°.
计算: - | 4 - 12 | - ( π - 3 . 14 ) 0 + 1 - cos 30 ∘ × 1 2 - 2 .
(1)计算:2 ﹣ 2+(3 27 ﹣ 1 4 6 )÷ 6 ﹣3sin45°;
(2)解方程: x - 3 x - 2 +1= 3 2 - x .
(1)化简求值: 2 x x + 1 + 4 - 2 x x 2 - 1 ÷ x - 2 x 2 - 2 x + 1 ,其中 x=﹣2 2+2sin45°+|﹣3|;
(2)解不等式组: x - 3 ( x - 2 ) ≤ 8 ① 2 x - 1 5 > x + 1 2 - 1 ② ,并求其非负整数解.
先化简,再求值: x 2 x + 1 - x + 1 ,其中 x= 12 ﹣( 1 4 ) ﹣ 1﹣|1﹣ 3 |.
(1)计算: ( - 1 ) 2018 - 2 cos 30 ∘ - 1 2 - 2 - | 3 - 2 | + ( 2018 - π ) 0
(2)先化简,再求值: x 2 - 2 x + 1 x 2 - x - 4 - x 2 x 2 + 2 x ÷ x - 4 x ,且 x为满足﹣3< x<2的整数.
(1)计算: | - 2 | - 2016 0 + 1 2 - 2
(2)解不等式组: 2 3 x > 5 - x x + 2 > 2 x - 3 .
计算: - | - 1 | + 12 ⋅ cos 30 ∘ - - 1 2 - 2 + ( π - 3 . 14 ) .
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