简便运算666.66*6666.7+99999*22.222_数学解答

简便运算666.66*6666.7+99999*22.222

人气：119 ℃　时间：2020-06-11 02:05:16

解答

666.66×6666.7+99999×22.222
=666.66×6666.7-22.222+100000*22.222
=30*22.222*6666.7-22.222+100000*22.222
=30*6666.7*22.222-22.222+100000*22.222
=(200001-1)*22.222+100000*22.222
=300000*22.222
=6666600