简便计算54321×12345-54322×12344

分类: 作业答案 • 2021-12-19 15:15:39

问题描述：

答

原式=54321×12345-(54321+1)×12344
=54321×12345-54321×12344-12344
=54321×(12345-12344)-12344
=54321-12344
=41977