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一、教学目标(一)认识与记忆1.记住自然数、整数的意义。2.认识并记住整除、约数和倍数、奇数和偶数、质数和合数,质因数和互质数的意义。3.记住能被 2、5、3整除的数的特征。4.认识分解质因数的意义5.认识和记住公约数、最大公约数、公倍数、最小公倍数的意义。(二)理解1.能区别整除与除尽的不同含义。2.能理解约数,倍数含义,能找出一个数的约数和倍数。3.能区分奇数与质数;偶数与合数;质数与质因数的不同含义。4.能判断一个数能否被2、5、3整除。5.能明确用分解质因数的方法求最大公约数和
First, the teaching objectives (A) understanding and memory 1. Remember the natural number, the meaning of integers. 2. Recognize and remember the meanings of divisions, divisors and multiples, odd and even numbers, prime numbers and composite numbers, prime factors and prime numbers. 3. Remember the number of divisible by 2,5,3 features. 4. Understand the significance of the quality factor decomposition 5. Recognize and remember the significance of the common divisor, the greatest common divisor, the common multiple, the least common multiple. (B) to understand 1. To distinguish between divisibility and division of the different meanings. 2. To understand the divisor, multiple meaning, can find a number of divisors and multiples. 3. Can distinguish between odd and even primes; even and coincident; primes and primes have different meanings. Can determine whether a number can be divisible by 2,5,3. 5. Clearly use the factorial method of factoring to find the greatest common divisor and