3.6*7.25+2.75*3.1简便运算急！！！_数学解答

3.6*7.25+2.75*3.1简便运算
急！！！

人气：407 ℃　时间：2020-04-10 15:49:28

解答

=3.1*7.25+0.5*7.25+3.1*2.75
=3.1*(7.25+2.75)+0.5*7.25
=3.1*10+3.625
=31+3.625
=34.625