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约分的关键是求最大公约数。用分解质因数法求几个数的最大公约数,有时很难一下子看出它们有没有公共的质因素,在此情况下,我们可以用辗转相除法求两个或两个以上数的最大公约数。具体方法如下: 一、如果要求最大公约数的两数中含有小数点时,要同时乘以10或100……把小数点消去。二、比较两数的大小,用大数除以小数,到余数小于除数止。余数有三种情况:<1>余数等于零时,根据最大公约数的性质:如果两个已知数中的一个数能被另一个
The key point is to find the greatest common divisor. Using the factorization factor method to find the greatest common divisor of several numbers, it is sometimes hard to see immediately whether they have a common qualitative factor. In this case, we can use the division of the twenties to find the greatest of two or more numbers common divisor. Specific methods are as follows: First, if the two divisors containing the greatest common divisor are required to be multiplied by 10 or 100 at the same time ..., the decimal point should be eliminated. Second, compare the size of two numbers, divided by the decimal number, to the remainder less than the divisor only. There are three cases for the remainder: <1> When the remainder is equal to zero, according to the nature of the greatest common divisor: If one of the two known numbers can be replaced by another