121121121121／212121212121／×121212121212／212212212212

来源：学生作业帮编辑：搜搜考试网作业帮分类：数学作业时间：2024/06/05 18:54:58

121121121121／212121212121／×121212121212／212212212212
简便运算.

(121121121121/212121212121)×(121212121212/212212212212)
=(121121121121/212212212212)×(121212121212/212121212121)
=121/212*(12/21)
=121/371

121121121121 121212121212