简便运算:(3.14*7.42+2.58*3.14)/(3.25+3.14-3又1/4)
问题描述:
简便运算:(3.14*7.42+2.58*3.14)/(3.25+3.14-3又1/4)
答
(3.14*7.42+2.58*3.14)/(3.25+3.14-3又1/4)
=[3.14*(7.42+2.58)]/(3.25-3.25+3.14) 3又1/4就是3.25
=3.14*10/3.14
=10