“小数的意义和性质”这一单元的教学基础,是“整数的意义”、“小数的初步认识”和“分数的初步认识”,教材遵循由易到难、由简到繁的原则,在这一单元里,共安排了“小数的意义”、“小数的性质”、“小数的大小比较”、“小数点位置移动引起小数大小的变化”、“小数和复名数”等五个小节的内容。这些内容联系紧密,系统性很强,把它们合在一起,便构 The teaching foundation of the unit of “meaning and nature of decimals” is “the meaning of integers”, “primary recognition of decimals” and “primary recognition of scores”. The teaching materials follow the principle of from easy to difficult, from simple to complex, In this unit, there are a total of five sections, “Meaning of Decimals,” “Nature of Decimals,” “Comparison of the Size of Decimals,” “Changes in the Decimal Size of the Decimal Point Positions,” “Decimals and Compound Names.” content. These are closely linked and systematic systems that bring them together