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一、分析法则,做好铺垫除数是小数的除法的计算法则,大体可分为三层意思:(1)先移动除数的小数点,使它变成整数;(2)除数的小数点向右移动几位,被除数的小数点也向右移动几位;(3)然后按照除数是整数的除法进行计算。要根据学生掌握这些旧知识的情况组织复习,为学习新知识做好准备。(1)下面的数去掉小数点各扩大多少倍?0.4 3.5 6 1.063 0.05 8.2 0.009(2)把5、74、36分别扩大10倍、100倍、1000
First, the analysis of the law, well paved divisor is the decimal division of the law of division can be divided into three meanings: (1) First move the divisor of the decimal point, so that it becomes an integer; (2) Divide the decimal point to the right Bit, the divisor of the decimal point also moved to the right a few; (3) and then according to the divisor is an integer division calculation. According to the students grasp the old knowledge of the organization review, in order to learn new knowledge to prepare. (1) The number of decimal places to remove the expansion of the number of times? 0.4 3.5 6 1.063 0.05 8.2 0.009 (2) 5,74,36, respectively, to expand 10 times, 100 times, 1000