简便计算7/11×1/7×10/7×7/11
问题描述:
简便计算7/11×1/7×10/7×7/11
答
7/11×1/7×10/7×7/11
=10/11
答
7/11×1/7×10/7×7/11
=1/11×10/11
=10/121