简便计算53乘54+54乘16+69乘25+21乘69
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/05/18 07:11:17
简便计算53乘54+54乘16+69乘25+21乘69
53x54+54x16+69x25+21x69
=54x(53+16)+69x(25+21)
=54x69+69x46
=69x(54+46)
=69x100
=6900
=54x(53+16)+69x(25+21)
=54x69+69x46
=69x(54+46)
=69x100
=6900