NUMEROS ENTEROS parte 1

With unit number 1, we're going to look at the set of integers. In the first part, we'll cover the number line, comparing integers, the absolute value, the opposite of an integer, and operations such as addition and subtraction of integers. We'll begin with integers. In previous videos, we said that the set of integers

is an extension of the set of natural numbers. That is to say, the set of integers, symbolized by the letter Z, is made up of the natural numbers, or positive integers, negative integers, and zero. In this case, we abbreviated it as: positive integers + zero + negative integers form the set of integers.

Positive integers are preceded by a plus sign. When there is no sign in front of a number, it is understood to be positive. To express a positive number, I can put a plus sign in front of it or I can leave it without a sign. In both cases, I am indicating that the number is positive. So, in

this case, the 3 can be alone, indicating that it is positive, or I can put a plus sign in front of it. He also indicated that this number is positive. Negative integers are preceded by the minus sign to express why negative numbers always have to have a minus sign in front, and 0 is neither positive nor negative.

Let's see the representation of integers. Integers are represented on a number line. On a number line, in the middle, there will always be zero, and I establish a unit that must be respected to locate the rest of the numbers. Once I establish that unit, to the right, there will be the positive integers located in increasing order, that is,

from least to greatest, and to the left, there will be the negative numbers ordered in decreasing order. The number line grows from left to right. This means that positive numbers are greater than zero, and negative numbers are less than zero. Every positive number is greater than any negative number. If the numbers are positive, the further they are from zero, the larger they are.