简便计算：85.5*2345-85.4*1345_数学解答

简便计算：85.5*2345-85.4*1345

人气：488 ℃　时间：2020-02-04 22:20:20

解答

85.5*2345-85.4*1345
=85.4*2345-85.4*1345+0.1 *2345
=85.4*(2345-1345)+0.1 *2345
=85.4*1000+234.5
=85400+234.5
=85634.5