简便运算 3/4-5/7-2/7+5/4 11X11X11-11X11-10
问题描述:
简便运算 3/4-5/7-2/7+5/4 11X11X11-11X11-10
答
11×11×11-11×11-10
=11×11(11-1)-10
=11×11×10-10
=1210-10
=1200