11x11x90-11怎么简便计算?

2024-12-02 18:29:46
推荐回答(2个)
回答1:

见图

回答2:

11×11×90-11
=11×990-11
=(10+1)×990-11
=10×990+990-11
=9900+990-11
=10890-11
=10879