What are the types of mathematics, physics and chemistry, and what does physics and chemistry mean i

Rationalization in mathematics refers to: for a fraction, if the numerator (or denominator) is an algebraic formula composed of irrational numbers in a lifetime, the process of turning it into a rational number by Liang and some methods is called the numerator (or denominator) rationalization.

For example: 7 - 6 Rationalizing its molecule is:

1 ( 7 - 6 ) rationalizes its denominator is:

1.Rational numbers, by definition, can be divided into integers and fractions.

2.There are three types of integers: positive integer chains, zeros, and negative integers. Shed old.

3.There are two categories of scores: positive scores and negative scores.

4.Therefore, rational numbers can also be divided into positive, zero, and negative numbers according to their properties.

Rational numbers are divided into: integers and fractions. Integers are divided into positive integers, zeros, and negative integers; The score is divided into: positive score, negative score teasing.

Rational numbers are divided into positive rational numbers, zeros, and negative rational numbers. Positive rational numbers are divided into positive integers and positive fractions; Negative rational numbers are divided into negative integers and negative fractions. Classification of rational numbers.

1. Classification according to the definition of rational numbers.

Rational numbers are divided into: integers and fractions. Integers are divided into positive integers, zeros, and negative integers; The score is divided into mountain and field rounds: positive score and negative score.

2. Classification according to the nature of rational numbers.

Rational numbers are divided into positive rational numbers, zeros, and negative rational numbers. Positive rational numbers are divided into positive integers and positive fractions; Negative rational numbers are divided into negative integers and negative fractions.

Multiplication of rational numbers.

1. The same sign is positive, the different sign is negative, and the absolute value is multiplied.

2. Multiplying any number by zero gives zero.

3. Several numbers that are not equal to zero are multiplied by the ridge, and the sign of the product is made up of negative factors'The number determines that when there are odd numbers of negative factors, the product is negative, and when there are even numbers of negative factors, the product is positive.

4. When several numbers are multiplied, there is a factor that is zero, and the product is zero.

5. Multiply several numbers that are not equal to zero, first determine the sign of the product, and then multiply the absolute value.

1. Classification according to the definition of rational numbers. Rational numbers are divided into: integer rents and fractions. Integers are divided into positive integers, zeros, and negative integers; Scores are divided into: positive and negative.

2. Classification according to the nature of rational numbers. Rational numbers are divided into positive rational numbers, zeros, and negative rational numbers. Positive rational numbers are divided into positive integers and positive fractions; Negative rational numbers are divided into negative integers.

Classification of real numbers.

1. It can be divided into integers and fractions.

The whole number of towns can be divided into positive integers, 0s, and negative integers.

Scores can be divided into positive scores and negative scores.

2. It can be divided into positive numbers, disadvantages, tremors, 0, and negative numbers.

Positive numbers can be further divided into positive integers and positive fractions.

Negative numbers can be divided into negative integers and negative fractions.