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复习提要 数的概念可以分为以以下三个方面。 (一)、整数、小数的基本概念。 主要包括自然数、整数、小数的意义、数位、计数单位、数的读、写方法、改变计数单位的改写和省略写、以及小数点位置的移动引起小数值的变化和复名数与小数等知识。 (二)、分数、百分数的基本概念。 主要内容有分数、百分数的意义、分数的单位和基本性质、分数、小数、百分数的互化和大小比较等。 (三)、数的整除。 主要内容有整除、偶数、奇数、质数、合数、互质数、约数、倍数、最大公约数、最小公倍数和能被2、3、5整除的数的特征,以及求几个数的最大公约数、最小公倍数、分解质因数等方法。
The concept of reviewing digests can be divided into the following three aspects. (A), the basic concepts of integers, decimals. Mainly includes the natural number, the integer, the meaning of the decimal, the digit, the counting unit, the number of reading and writing methods, changing the rewriting of the counting unit and omitting the writing, and the movement of the decimal point position causes the decimal value change and the complex name and decimal knowledge. (B), the basic concepts of scores, percentages. The main content of the scores, the meaning of the percentage, the unit and the basic nature of the scores, scores, decimals, percentage of each other and the size of the comparison. (C), the number of divisions. The main contents are divisions, even numbers, odd numbers, prime numbers, composite numbers, prime numbers, divisors, multiples, the greatest common divisor, the least common multiple and divisible by 2, 3, and 5, as well as the maximum number of conventions Number, the least common multiple, decomposition factor and other methods.