2-9/19-10/19用简便方法怎么算啊?
问题描述：
2-9/19-10/19用简便方法怎么算啊?
答
2 - 9/19 - 10/19 = 2 - (9/19 +10/19) = 2 - 19/19 = 2 - 1 =1
2-9/19-10/19用简便方法怎么算啊?
2 - 9/19 - 10/19 = 2 - (9/19 +10/19) = 2 - 19/19 = 2 - 1 =1