简便计算53乘54+54乘16+69乘25+21乘69

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简便计算53乘54+54乘16+69乘25+21乘69简便计算53乘54+54乘16+69乘25+21乘69简便计算53乘54+54乘16+69乘25+21乘6953x54+54x16+69x25+2

简便计算53乘54+54乘16+69乘25+21乘69
简便计算53乘54+54乘16+69乘25+21乘69

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

都化成60