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“倍的认识”在人教版实验教材中是安排在二年级上册“7的乘法口诀”之后的,主要让学生通过实际操作,获得大量的感性认识,逐步形成“倍”的概念,并利用以前所学习的知识,让学生理解“求几个几就是求一个数的几倍是多少,用乘法计算”。新教材把这部分知识向后推移至三年级上册,这是考虑到等除法知识学习之后再教这部分内容,让学生对“倍”的知识学习会更完整。新教材中,例1保留原有的内容,但更注重通过有效的情境引导学生通过观察、圈、摆等活动,帮助他们获得大量的感性认识,逐步建立“倍”
“Times of understanding ” in the PEP teaching material is arranged in the second grade on the book “7 multiplication formula ”, mainly for students through practical operation, access to a large number of perceptual knowledge, and gradually form “The concept, and use of previously learned knowledge, so that students understand ” a few few is to find a few times the number is multiplied. “ The new textbook this part of knowledge backwards to the third grade, which is to take into account the division of knowledge after learning to teach this part of the content, so that students ”times “ knowledge will be more complete. In the new textbook, Case 1 retains the original content, but pays more attention to using effective situations to guide students to gain a large amount of perceptual awareness through observation, circle and pendulum activities, and gradually establish ”double"