Welcome children! In earlier classes we have studied about Number systems. In Math Grade V of Karnataka state board sslc syllabus we will study more about them.
We know that all counting numbers are called natural numbers. But any time we need to measure some units like weight, length or capacity of any container, we usually start from 0.
This series of numbers starting from 0, 1, 2, 3... up to infinite is called a series of whole numbers.
So we can say that whole numbers are measuring numbers and natural numbers are counting numbers. Number system in math has a very important role to play in our life.
In fact our life revolves around the numbers
If we need to count the number of students in a class, or number of books in your bag we always start the counting by 1 not by zero (0).
Now let us look at some common properties of numbers.
1. Zero (0) is called Additive Identity, which means if we add or subtract zero to any number, the result remains unchanged.
E.g. 45 + 0 = 45 and 37 - 0 = 37
2. One (1) is called multiplicative identity, which means if we multiply or divide any number by 1, the result remains unchanged.
E.g.: 65 * 1 = 65 and 24 / 1 =24
3 . Both addition and multiplication satisfies closure property, which means if any two natural numbers or whole numbers are added or multiplied, the sum and the
Product is also a natural number. E.g. 2 + 5 = 7. Here 2 and 5 are added to give 7.
We can observe that 2 and 5 are natural numbers and the sum is also a natural number.
Similarly 2 * 5 = 10. Here 2 and 5 are multiplied to give 7.
We observe can that 2 and 5 are natural numbers and the product 10 is also a natural number
In next post we will talk on grade V. For more information on algebra 2, you can visit our website
We know that all counting numbers are called natural numbers. But any time we need to measure some units like weight, length or capacity of any container, we usually start from 0.
This series of numbers starting from 0, 1, 2, 3... up to infinite is called a series of whole numbers.
So we can say that whole numbers are measuring numbers and natural numbers are counting numbers. Number system in math has a very important role to play in our life.
In fact our life revolves around the numbers
If we need to count the number of students in a class, or number of books in your bag we always start the counting by 1 not by zero (0).
Now let us look at some common properties of numbers.
1. Zero (0) is called Additive Identity, which means if we add or subtract zero to any number, the result remains unchanged.
E.g. 45 + 0 = 45 and 37 - 0 = 37
2. One (1) is called multiplicative identity, which means if we multiply or divide any number by 1, the result remains unchanged.
E.g.: 65 * 1 = 65 and 24 / 1 =24
3 . Both addition and multiplication satisfies closure property, which means if any two natural numbers or whole numbers are added or multiplied, the sum and the
Product is also a natural number. E.g. 2 + 5 = 7. Here 2 and 5 are added to give 7.
We can observe that 2 and 5 are natural numbers and the sum is also a natural number.
Similarly 2 * 5 = 10. Here 2 and 5 are multiplied to give 7.
We observe can that 2 and 5 are natural numbers and the product 10 is also a natural number
In next post we will talk on grade V. For more information on algebra 2, you can visit our website
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