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第一章数的认识一、复习要点1.整数的认识。自然数、零、整数、基数、序数的意义,数字、数位、计数单位及其进率的意义,数级和数节的区别;整数的读法和写法;把一个数改写成用“万”或“亿”作单位的数;把一个数的某一位后面的尾数省略,求出它的近似数。2.数的整除。整除、除尽、倍数、约数的意义,能被2、5、3整除的数的特征;奇数、偶数、质数、合数、质因数、互质数、公约数、公倍数、最大公约数、最小公
The first chapter of the number of understanding First, the review points 1. The integer understanding. The meaning of natural numbers, zeros, integers, radixes, ordinal numbers, numerals, digits, the meaning of counting units and their rates, the difference between levels and numbers, the reading and writing of integers, the rewriting of a number as “ ”100 million" for the number of units; the number of mantissa behind a omitted, find its approximate number. The number of divisions. Divisible, Divisible, Multiples, Divisible, Divisible by 2,5,3 Features Odd, Even, Prime, Composite, Prime, Prime, Common Divisor, Common Divisor, Greatest Common Divisor, Min public