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Knowing Our Numbers

With the help of numbers, we can count living and non-living objects. For example, number of chocolates, number of marbles, number of birds, etc. Numbers help us to identify which collection of objects is bigger and arrange them in order.




 

We must note that the number should not start with zero. If the number starts with zero, then remove the zero and follow the steps because a number cannot begin with zero.

Now, when you stand in a line for the morning assembly in your school, you must have observed that you often stand according to your heights. The taller students stand at the back of the line and the shorter ones in the front. This is nothing but standing in the line in increasing order of your heights. On the contrary, if one starts counting from the back, then you are standing in decreasing order of your heights.

Therefore, there are two ways of arrangement of numbers (objects).

  1. Ascending order: The arrangement of numbers from the smallest to the greatest is known as ascending order. Ascending order means in increasing order.

For example, if we have to write the numbers 81, 18, 26, and 47 in ascending order, then they will be written as 18, 26, 47, and 81.

  1. Descending order: The arrangement of numbers from the greatest to the smallest is known as descending order. Descending order means in decreasing order.

For example, if we have to write the numbers 54, 12, 98, and 4 in descending order, then they will be written as 98, 54, 12, 4.

Ascending and descending orders are reverse of each other.

Now, let us solve some examples to understand this topic better.

Example 1:

Which number is greater, 426 or 4378?

Solution:

The first number is a three-digit number and the second number is a four-digit number. Therefore, 4378 is greater than 426.

Example 2:

Find the greatest and the smallest number among the following numbers.

1018, 1081, 1801, 1011, 1065

Solution:

Here, all the given numbers are four-digit numbers. First digit is same for all the numbers. Second digit from the left is the greatest in third number (which is 8). Therefore, 1801 is the greatest number.

The third digit is same in the first and fourth numbers (which is 1), while the second and fifth numbers have 8 and 6 as their third digit. Among 1018 and 1011, the fourth digit is smaller for the latter number. Therefore, 1011 is the smallest number.

Example 3:

Arrange the following numbers in ascending and descending order.

1253, 7876, 1982, 1574

Solution:

Ascending order means the arrangement of numbers from the smallest to the greatest.

Therefore, the above numbers in ascending order are 1253, 1574, 1982, and 7876.

Descending order means arrangement of numbers from the greatest to the smallest.

Therefore, the above numbers in descending order are 7876, 1982, 1574, and 1253.

Example 4:

The...

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