(2.63+3/8)(25+2/5)(2.37-3/8)*(25+2/5)

分类: 作业答案 • 2022-02-25 20:46:18

问题描述：

(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)

答

中间是加号吧
(2.63+3/8)*(25+2/5)+(2.37-3/8)*(25+2/5)
=（2.63+2.37+3/8-3/8）(25+2/5)
=5x(25+2/5)
=5x25+5x2/5
=125+2
=127

(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)