只要熟记从1-25这25个数的平方,就能迅速说出1-100中各数的平方.请观察下表:你发现了什么?这个表中有一些非常美好的规律:(1)在前五十个平方数中,以25为中心,关于25对称(如13与37,24与26,1与49等)的两个数,它们的平方的末两位数相同(如13与37,它们的平方的末两位数都是69);它们的平方的百位与千位的关系是:较 Just memorize the 25-squared numbers from 1-25, and you can quickly say the square of each number in 1-100. Please observe the following table: What do you find? There are some very beautiful rules in this table: (1 In the first fifty squares, centered on 25, with respect to the two symmetries of 25 (eg, 13 and 37, 24 and 26, 1 and 49, etc.), the last two digits of their squares are the same (eg, 13 With 37, the last two digits of their squares are 69); the relationship between their squares and the thousand is: