In natural numbers, one left and one right are opposites, and the two digits are

Hello, in natural numbers, the left number -1 of 0 and the number 1 on the right are opposite to each other.

Opposite: -4, 2, 0, 1 3, -4 9

On the number line, 0 is the middle hand, and the heart is expressed on both sides according to the scale. Negative numbers are on the left and positive numbers are on the right.

And is 0 two numbers are opposite to each other.

For example, -6 and +6 are inverses to each other.

The opposite of 0 is 0.

So the opposite of a number is equal to itself, and this number is 0

Can be converted to:

1.-3 and -3

2.-3 and -3

3.-3 and -3

4.-3 and -3 According to the definition of inverse numbers, it can be seen that the sum of two numbers equals 0 is the opposite of each other, so choose 2

Only 22-3 and -3

The other 3 are all equal.

Each option can be analyzed one by one according to the definition of the reciprocal and inverse numbers and the nature of the absolute value.

Solution: , the opposite of the number is , so this option is wrong;

The absolute value of a number must not be less than this number, so this option is correct;

The opposite of the number is that their quotient is meaningless, so this option is wrong;

The reciprocal of is itself, so this option is incorrect.

Therefore, it is chosen. This question examines the definition of the reciprocal number, the opposite number and the nature of the absolute value.

Opposite number

The algebraic meaning of opposites.

And is 0 two numbers are opposite to each other. The opposite of 0 is still 0.

1. Only two numbers with different symbols are called opposite to each other. A and -a are a pair of opposite numbers, a is called the opposite of -a, and -a is called the opposite of a. Note: -a is not necessarily a negative number. A doesn't have to be a positive number. (a does not equal 0).

2. If the two real numbers a and b satisfy b = a. Let's say that b is the opposite of a.

3. Two real numbers a and b that are opposite to each other must satisfy a+b=0. It can also be said that the real numbers a and b satisfy a+b=0, then the two real numbers a and b are opposite to each other.

4. The opposite of a real number x, y, is actually a mapping from r to r: y=f(x)=-x.

From a two-dimensional perspective, this mapping can be seen as a rotational (180 degrees) mapping (central symmetry);

This mapping can also be seen as a folded (180 degrees) mapping (axisymmetric);

x=0, which is the fixed point under this map.

The geometric meaning of opposite numbers.

1. The geometric meaning of opposite numbers On the number axis, two numbers represented by two points with equal distances from the origin are opposite to each other.

2. On the number line, two points that are opposite to each other (except 0) are located on either side of the origin and are symmetrical with respect to the origin.

3. At this time, the opposite number of b is b= (a)=a, then we say that "the opposite number has mutual symmetry";

Recognize the concept. Note the conceptual difference between "opposite numbers" and "opposite numbers".

Opposite numbers always appear relatively, e.g. the opposite of +3 is -3, and the opposite of -3 is +3. The opposite of any number is unique.

Natural number. Natural numbers, which can refer to positive integers (1, 2, 3, 4...).It can also be a non-negative integer (0, 1, 2, 3, 4...).

For example, the former is usually used in number theory, while the latter is mostly used in set theory and computer science. One of the reasons to think that natural numbers don't contain zeros is because people (especially children) start learning numbers from "one, two, three." Instead of starting with "zero, one, two, three."

To start, because it's unnatural.

Natural numbers usually serve two purposes:

Can be used to count (e.g. "there are three apples"), see cardinality.

It can also be used for sorting (e.g., "This is the third largest city in the country") and refer to ordinals.

The divisible properties of natural numbers, such as the distribution of prime numbers, are topics in the field of number theory. Questions about counting, such as Ramsey's theory, are studied in combinatorics.

Mathematicians generally represent a set of natural numbers. It is a countable, infinite collection of supreme realms.