人教版四年级数学上册概念知识点整理
人教版四年级数学上册概念知识点整理第一单元1、亿以内数的认识:10个一万是十万,10个十万是一百万,10个一百万是一千万,10个一千万是一亿。小结:相邻两个计数单位之间的进率是“十”2、亿以内数的读法:小结:①从高位数读起,一级一级往下读。②万级的数要按照个级的数的读法来读,再在后面加一个万字。③每级末尾不管有几个零都不读,其他数位有一个“零”或连续几个“零”,都只读一个“零”。3、亿以内数的写法:小结:①从高级写起,一级一级往下写。②当哪一位上一个计数单位也没有,就在哪一位上写0。4、比较亿以内数的大小:小结:①位数多的时候,这个数就比较大。②当这两个数位数相同的时候,我们就应该从左起的第一...
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