(5.87+1514+2.13+914)×(234−1.75)+(1÷27−3.5)×3.99
(5.87十1又14分之5十2.13十l4分之9)x(2又4分之3-1.75)十(1除于7分之2-3.5)x3.99
(5.87+1又14分之5+2.13+14分之9)x(2又4分之3-1.75)+91除以7分之2-3.5)X3.99 简
化简求值:(3x−1−x−1)÷x−2x
(1)(π−1)0+(−12)−1+|5−27|−23.
521×27+21921×57+(1−27)
计算:18.25×1145−1714÷(1−5459)
−18÷(−3)
(1)计算:(27+13)−(12−15+45);
计算:3.5÷113+6.5×[12×(113−0.3)−0.15]
化简:(1a−1)÷a
先化简,再求值:(x−1x−x−2x+1)÷2x
(2012•广陵区二模)先化简再求值:(3x−1−x−1)÷x−2x