一、紧扣简便算法作好复习铺垫乘、除法简便算法的复习分别设置了两道题,第(1)题包括乘(除)数是整数的口算题及将一个数分解成两数之积的口算题,它们分别是为乘(除)法的两种简便算法服务的。教者还可以补充一些类似的口算题,组织学生练习。第(2)题为具有两种解法的应用题,它是为揭示简算算理作铺垫的。如: 商店有5盒手电简,每盒12个。每个手电筒卖6元,一共可以卖多少元? First, close to the simple algorithm to make up for review bedding, division simple algorithm review set up two questions, respectively, the first (1) questions include multiplication (division) is the integer number of mouth arithmetic and a number is divided into two , Respectively, for the two easy algorithms of multiplication (division). Teachers can also add some similar oral questions, organize student practice. Problem (2) is a question with two solutions, which paves the way for revealing a simple arithmetic. Such as: stores have 5 boxes of flashlight, 12 per box. Each flashlight sold 6 yuan, a total of how many dollars can be sold?