Negative and Positive Numbers

In the previous post we have discussed about Functions and Relations and In today's session we are going to discuss about Negative and Positive Numbers.

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Integer numbers extend from negative infinite to positive infinite numbers. Now we will look at Positive And Negative Number.

If we draw a number line representing the integer numbers and observe that numbers representing on the left side of the number line are all negative numbers and the numbers represented on the right side of the number line are positive numbers. Now if we look at the Positive and negative numbers, we observe that every positive number has its reverse and if we add the positive number and its reverse, we get the result 0. So we call 0 as the additive identity. We can express this relation as follows:

Let the number is 5, its negative number is (-5). Now if we add 5 and -5, we get:

  = 5 + (-5) = 0.

All mathematical operations can be performed on positive and negative numbers. Even positive numbers can be compared.

While comparing numbers we must remember the following rules:

1.    If we compare the positive number with number zero, we say all positive numbers are always greater than 0.

2.    If we compare a negative number with number 0, then we conclude that all negative numbers are always less than zero.

3.     If positive and negative numbers are compared, we conclude that all negative numbers are always smaller than positive numbers.

4.   More we move to the left of the number line, the numbers goes on decreasing. On another hand, if we go on moving to the right of the number line, we come to the conclusion that the number increases.

Natural Elements can be studied in books of cbse class 10 sample papers.