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复习要求1.在理解整数、小数意义的基础上,重点认识整数、小数的计数单位,掌握十进制计数法,数的组成与分解,熟记整数和小数数位顺序表;能正确地读写整数和小数,会用“亿”或“万”作计数单位记数,掌握小数的基本性质和小数点位置移动引起小数大小变化的规律,会用“四舍五入”法取近似值。2.“数的整除”这部分知识中,概念比较多,要注意它们的比较,弄清它们之间的联系与区别。在此基础上
Review Requirements 1. On the basis of understanding the meaning of integers and decimals, we should know the counting units of integers and decimals emphatically, master the decimal counting method, the composition and decomposition of numbers, and memorize the integer and fractional digit sequence tables; Decimals will be “million” or “million” count unit count, to grasp the basic nature of decimals and decimal point position changes caused by the decimal size of the law, will use the “rounding” method to approximate. 2. “The number of divisions” This part of the knowledge, the concept is more, pay attention to their comparison, to find out the relationship between them and the difference. on the basis of