通过分析美国23个州婴幼儿学习与发展标准数学领域之数与运算子领域的内容,发现各州的数与运算领域大致包含了数量概念,计数,数学词汇,数运算等几个方面。大多数州强调婴幼儿数量概念、计数能力的发展,不同年龄段的指标遵循了从简单到复杂的顺序,但在具体的指标上,各年龄段的要求存在着差异。 By analyzing the field of numeration and numeration of mathematics in infant learning and development in 23 states, it is found that there are several aspects in number and operation of counties, such as quantitative concepts, counting, math vocabularies and arithmetic. Most states emphasize the concept of number of infants and young children, the development of numeracy skills, and the indicators of different ages follow a simple to complex order. However, there are differences in the requirements of each age group on specific indicators.