(1)计算:80+(2-3)-1+12;(2)计算:aa-2-2a-2. 发布时间:2017-05-03 13:13 │ 来源:www.tikuol.com 题型:解答题 问题: (1)计算:80+(2-3)-1+12;(2)计算:aa-2-2a-2.