33乘以3333加9999乘以8889的简便法怎么算
问题描述:
33乘以3333加9999乘以8889的简便法怎么算
答
33乘以3333加9999乘以8889
=9999x11+9999x8889
=9999x(11+8889)
=(10000-1)x8900
=89000000-8900
=88991100