24.7×16.5+24.7×78.6+24.7×4.9 简便方法

问题描述:

24.7×16.5+24.7×78.6+24.7×4.9 简便方法

24.7×16.5+24.7×78.6+24.7×4.9
=24.7×(16.5+78.6+4.9)
=24.7×100
=2470