题目

计算题（每小题4分，共16分）⑴                         ⑵ ⑶                   ⑷ 答案：⑴                        ⑵ ="-8+11 " ---------------- 2分           =------------- 2分-- ="3 " -------------------- 4分           =  -------------------- 3分 ="16 " ----------------------- 4分⑶                 ⑷ -- ="-12-20+14 " ------------ 2分           =------------- 3分-- ="-32+14 " --------------- 3分           =-1+2-12-- ="-18 " ------------------ 4分           ="-11 " ---------------------- 4分解析:略

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