奥数举一反三题53.5乘35.3加53.5乘43.2加78.5乘46.5

分类: 作业答案 • 2022-02-21 21:34:28

问题描述：

答

53.5*35.3+53.5*43.2+78.5*46.5
=53.5*(35.3+43.2)+78.5*46.5
=53.5*78.5+78.5*46.5
=78.5*(53.5+46.5)
=78.5*100
=7850