计算:tan60°+2sin45°-2cos30°
按要求解答下列各小题。(1)计算:6cos60°-(sin21°-1)0×5tan45°;(2)解方程:4x(3x-2)=6x-4.
(1)解方程;(2)计算:.
计算:(每小题4分,共16分)(1) (2)(3) (4)
计算(每题3分,共9分)(1) (2)(-32)÷4×(-8) (3)
计算: (1) (2); (3)