早教吧 育儿知识 作业答案 考试题库 百科 知识分享

计算(结果用л表示):(1){{π}+π}+{[π]+π}+[{π}+π]+[[π]+π];(2)[10-2π]+[π]×{π}.

题目详情
计算(结果用л表示):
(1){{π}+π}+{[π]+π}+[{π}+π]+[[π]+π];          (2)[10-2π]+[π]×{π}.
▼优质解答
答案和解析
(1){{π}+π}+{[π]+π}+[{π}+π]+[[π]+π]
={π-[π]+π}+{[π]+π}+[π-[π]+π]+[[π]+π]
={2π-3}+{π+3}+[2π-3]+[π+3]
=2π-3-[2π-3]+π+3-[π+3]+[2π-3]+[π+3]
=3π

(2)[10-2π]+[π]×{π}
=[3.72]+[π]×(π-[π])
=3+3×(π-3)
=3+3π-9
=3π-6