简便算法75×27+19×25=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 06:50:05
简便算法75×27+19×25=?
简便算法75×27+19×25=?
简便算法75×27+19×25=?
75×27+19×25
=(25×3)×27+19×25
=25×(3×27)+19×25
=25×81+19×25
=25×(81+19)
=2500
简便算法75×27+19×25=?
简便算法75×27+19×25=?
简便算法75×27+19×25=?
75×27+19×25
=(25×3)×27+19×25
=25×(3×27)+19×25
=25×81+19×25
=25×(81+19)
=2500