如图,CA=CD,∠B=∠E,∠BCE=∠ACD.求证:AB=DE.
+|-2|++(-1)2011
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
(本大题共4分)计算;
计算:.
计算(1) (2)