987654321×12345-987654322×12344的简便运算是什么

分类: 作业答案 • 2023-01-07 23:00:37

问题描述：

987654321×12345-987654322×12344的简便运算是什么
QAQ

答

987654321×12345-987654322×12344
=987654321×12345-987654321×12344-12344
=987654321×（12345-12344）-12344
=987654321-12344
=987641977