Comparison of Numbers
Category : 2nd Class
LEARNING OBJECTIVES
This lesson will help you to:
Real Life Examples
The large numbers are used to keep records of:
QUICK CONCEPT REVIEW:
For example: 12, 32, 49, 60
In this example, 60 is the greatest number.
For example: 5, 35, 40, 75
In this example 5 is the smallest number.
COMPARING NUMBERS
We use following signs to compare numbers.
'>' means greater than
'<' means smaller than
'=' means equal to
Let us take an example. Which number is greater between 20 and 9?
Amazing Facts
\begin{align}
& \begin{matrix}
T & O \\
2 & 0 \\
\end{matrix} \\
& 2\,digits \\
\end{align} \begin{align}
& \begin{matrix}
T & O \\
{} & 9 \\
\end{matrix} \\
& 1\,\,\,digits \\
\end{align}
20 has one more digit then 9. so, it is greater than 9.
\[\text{2}0\text{ }>\text{ 9}\]
Let us take another example.
Which is greater 25 or 35?
Both 25 and 35 have 2 digits. In this case, greater number at tens place will be checked since 3 > 2.
Therefore, since 35 > 25.
ORDER OF NUMBERS
Let us take an example
In the given image I, these children are ready to start a race. They are standing in order from smallest to greatest. When we write numbers from smallest to greatest, they are in increasing or ascending order.
As shown in image II, the children are now standing in order from greatest to smallest. When we write numbers from greatest to smallest, they are in decreasing or descending order.
Now try to arrange 36, 20, 56 in increasing order.
ODD AND EVEN NUMBERS
You must have observed in your routine life that various things are present in pairs. For example a pair of shoes, a pair of socks, a pair of gloves.
Objects that can be divided into pairs are called even numbers.
Now look at another image and try to find out whether they have even numbers or not.
In left image, after making two pairs, one bird is left. 5o it represents an odd number.
While in another image, after making two pairs no bird is left. So it represents an even number.
Objects that cannot be divided into pairs are called odd numbers.
In other words, it can be said that:
Numbers which have 0, 2, 4, 6, 8 at ones place are called even numbers.
Numbers which have 1, 3, 5, 7, 9 at ones place are called odd numbers.
POSITION OF AN OBJECT
You all give exams during your study. You also get marks. Have you observed that each one of you gets a position in the class.
Let us take an example.
Your friend Rahul got 2nd (second) position in the class, while you got 5th (fifth) position.
How positions are decided?
The marks one gets, decides one's position on in the class.
Let us take another example.
On sport's day. you all take part in the race. Someone wins and gets first position, someone gets 4th, 5th, 6th position and so on.
Numbers such as 1st, 2nd, 3rd, 4th specify position of an object in an ordered collection. These numbers are called ordinal numbers.
What is the position of V in STUDENT?
So, the position of 'U' is 3rd in the word.
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