计算:(共24分每题4分)(1) (2)[-2 2+(-2)3 ]-(-2)×(-3) (3)()() (4)(5)—14+〔1-(1-0.5×2)〕÷(6)[(-3)2-22-(-5)2]××(-2)4
.
计算:sin600cos300+
.计算:-2+(π-1)0+tan60°-;
(2-3)+(2+)(2-);