So Many Toys Class 1 Notes Maths

Introduction

• The information that we collect is called Data.
• Data Handling is a process of collecting organising and representing data in various form like graphe, tables, pictographs etc.                       
• Let us see an example to understand better the concept of data collecting.
• Look at the table. This table shows the number of fruits sold in a day by a fruit seller.
  

Do you know?

• Data handling represents data in the form of pictures (called pictograph). These pictographs used by various news channels to display weather report on news.

Real Life Example

• Data Handling is widely used in collection of scores of students in various exams.
• Data handling helps the doctors to keep records of their patients.
• Once we have information data, the next step is to get result from it.
• The information we get from the above data is that Mangoes are sold the most. Apples are sold the least.

Sort and organise

Look at the picture of two rooms, room A and room B.

Which room looks neat and clean?

Room B looks neat and clean as things are properly organised in Room B.
Let us understand how to sort and organise things.

• Sorting: Grouping objects on the basis of common features is called Sorting'.
• Organising: Arranging objects in a proper or systematic manner is called organising.

An organised room or display looks neat and clean. For example room B in above example.
Ramu has opened a new stationery shop. It has pens, pencils, erasers, books, notepads, envelopes, coloured chalks, papers and stickers at one place. How can he neatly arrange everything?
He can sort things and organise them on the basis of their size, shape, colour etc.
We can make a table to help us to sort our things.
Annie and her friends wants to celebrate Christmas. They want to purchase some items to decorate their Christmas tree. They prepare a list of various items, which are required to decorate the tree. The table given below shows the list of items and the number of items. This list will help Annie and her friends to remember the items to be purchased and their numbers.

Presenting Data

We can present data in the form of table, pictures, graph, bar graphs, etc. Let us understand with the help of an example. We will study graphs, bar graph in the next classes.

This is a collections of Naina’s toys.

The data for Naina's toys can be represented as follows.

It is easier to know from data representation that there are more number of toy dogs than teddy bears and Barbie dolls.

Greater Than Sign 

• The greater than symbol in maths is placed between two values in which the first number is greater than the second number. For example 10 > 5. Here 10 is greater than 5. 
• In inequality, greater than symbol is always pointed to the greater value and the symbol consists of two equal length strokes connecting at an acute angle at the right. ( >). 

Less Than Sign

• Similarly, a less than symbol is placed between two numbers where the first number is less than the second number. An example for less than the inequality symbol is 5 < 10. It means that 5 is less than 10. 
• In inequality, less than symbol points to the smaller value where the two equal length strokes connect at an acute angle at the left (<).
• This greater than less than symbol reduces the time complexity and it makes an easy way for the reader to understand.

Equal To Sign

• The ‘equal to’ sign is used to show the equality between two numbers or values. This sign contradicts both the greater than and less than sign. Even in terms of writing the equations, we use equal to sign. It is denoted by ‘=’.
  Example: If a = 10 and b = 10, then a = b.

Summary – All the Symbols

Here, given the list of frequently used symbols in Maths explained along with the examples