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在教学质数和合数的内容时,我发现很多学生不能很快判断出一个数是质数还是合数。根据多年的教学经验,我总结出能够快速判断一个数是质数还是合数的方法。一、要熟练掌握并理解质数和合数的概念,从而快速判断一个数是质数还是合数质数和合数这两个数学概念是根据一个数因数的个数,为自然数分类而产生的。只有1和它本身两个因数的数叫质数;除了1和它本身还有别的(或其他的)因数的数叫合数。因此,根据一个数
When teaching the content and the composite, I found that many students can not quickly determine whether a number is prime or composite. Based on years of teaching experience, I’ve come up with a way to quickly determine whether a number is prime or composite. First, we must master and understand the concept of prime numbers and composite numbers, so as to quickly determine whether a number is a prime or a composite prime number and composite number. These two mathematical concepts are based on the number of a number of factors, resulting from the classification of natural numbers. Only one and two of its own factors are prime numbers; except 1 and itself there are other (or other) numbers called multiples. So, according to a number