I hope I can help you.

Do it; (1, 2,3,4) is a positive number.

(-3, -4, -2,-1) is a negative number.

(0, 1, 2,3,4) is a natural number.

(-4, -3, -2,-1, 0, 1, 2,3,4) is an integer.

1, unit: ten, hundred, thousand/ten thousand. ...

2. Look at the digits first, there are many digits. If the number of digits is the same, compare from the highest digit, and the greater the number of digits, the greater it will be.

3, the basic nature of the score is; The numerator and denominator of a fraction are multiplied or divided by the same number (except 0) at the same time, and the size of the fraction remains unchanged.

Basic properties of decimals; Add or delete zeros at the end of the decimal, and the size of the decimal remains the same.

4. Move one place to the left to reduce 10 times, move one place to the right to expand 10 times, and so on.

5. Integer A can be divisible by integer B, where A is called a multiple of B and B is called a factor of A..

An integer can be divisible by another integer, which is a multiple of another integer. For example, 15 can be divisible by 3 or 5, so 15 is a multiple of 3 and 5.

Prime number: All integers greater than 1 have no divisor except 1 and itself. This integer is called prime number, and prime number is also called prime number.

Composite number: The divisor of a number has other divisors besides 1 and itself. This number is called a composite number.