(1) 102*99的简便运算

问题描述:

(1) 102*99的简便运算

两种方法:102×99 =(100+2)×99 =100×99+2×99 =9900+198 =10098 方法二:102×99 =102×(100-1) =102×100-102×1 =10200-102 =10098