脱式计算: (1)6760÷13+17×25 (2)4.82-5.2÷0.8×0.6
图象法解方程组
计算:; 解方程(2)8(x-1)3+27=0.
计算:(1)(-) (2)|| + || +
(本题16分)计算: (1) (2) (3) -14×(-2)+(-5)×2+4× (4)
计算: (1) (2) (3) (4)