简便计算53乘54+54乘16+69乘25+21乘69_数学解答

简便计算53乘54+54乘16+69乘25+21乘69

人气：228 ℃　时间：2019-08-22 09:39:25

解答

53x54+54x16+69x25+21x69
=54x(53+16)+69x(25+21)
=54x69+69x46
=69x(54+46)
=69x100
=6900