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在亿以内数的教学中,有些学生在读数时不是把数字中的“0”读重了,就是把数字中的“0”读漏了,而且读的速度又十分慢。例如:把301400读成“三十万零一千四百”,把100007503读成“一亿七千五百零三”等等。 为什么会出现如上错误读法呢?究其原因主要是:对我国读数规则中的数级概念不清;对一个数中每级各包含哪几个数位,它们分别在各级的哪个位置上不明确;对处于各级中的“0”的读法理解不透。 按照我国“四位一级,按级读写”的规律,从一个数的个位起,每四个数位组成一级:个位、十位、百位、千位组成个级;万位、十万位、百万位、千万位组成万级;亿位、十亿位、百亿位、千亿位组成亿级……在每一级里,除了级名外,它们都有自己的个、十、百、千,见下表:
In the teaching of hundreds of millions, some students do not read the “0” in reading the number, but read the “0” in the number, and the reading speed is very slow. For example: Read 301400 as “Three hundred and eleven thousand four hundred,” Read 100007503 as “Seven thousand five hundred and three” and so on. Why is there such a wrong reading law? The main reason is: the concept of the number of levels in our reading rules is not clear; for each level in a number of which contains a few numbers, respectively, at which position they are not Clear; understand the reading of “0” at all levels. In accordance with the law of “four levels and one level and reading and writing according to the level” of our country, from the first digit of a number, every four digits form one level: one digit, ten digit, one hundred digit and one thousand digit; One hundred thousand, one million, tens of millions to form a million; billion, one billion, ten billion, hundreds of billions of billion ... In each level, in addition to the rankings, they all have their own One, ten, one hundred, one thousand, see the table below: