Addition and subtraction

Number system is the basic tool for the mathematics to solve various types of problem. In the number system we generally deal with whole numbers, natural numbers, integers and decimals values. To perform the various tasks we being free math problem solver, execute the concept of operation with them. In the concept of operation, most popular operations are addition, subtraction, multiplication and division. Addition and subtraction are the most popular operations which are performed by students of Grade IV in a very easier way.
Addition: This concept can be defined as total of two or more numbers for generating the single value. The addition can be performed with single digit numbers to multiple digit numbers. The addition operation represented by the ( + ) plus symbol. In the concept of addition, there is no boundary for the no. of digit in the value that are used in the addition. In a more specific form addition is a mathematical operation that combine the collections of values into larger collection value. Addition operation can easily be executed on rational numbers or fractional numbers. Lets show you below the process of addition:
Example: Find the total of given numbers 1234 and 4321?
Solution: now we follow the process step by step
step 1: Arrange the numbers in following manner
   1 2 3 4
+ 4 3 2 1
_________________
   5 5 5 5
step 2: In this always remember, start the process from right hand side to left hand side.

Subtraction: This operation can be define as “compare the two different values and show the difference value into the new collection. Subtraction can be represented by the ( - ) minus symbol. Like a addition, subtraction can also be performed on any number of number system. Let's show you the process of subtraction into the given example:
Example: Find the difference value of given number 456 and 123?
Solution: 4 5 6
             - 1 2 3
_______________
              3 3 3


In upcoming posts we will discuss about Multiplication and division situations and Direct, Indirect, Standard, and Non-standard Units. Visit our website for information on business studies class 12 CBSE syllabus

Number Operations in Grade IV

Hello friends our today’s topic is the most basic topic of mathematics. In today’s session we will learn numbers, operations. Specifically addition and subtraction. When we start learning math, our faculty first introduces us with the numbers. Numbers (also read what are prime numbers) are the base of math. Numbers in mathematics are 0, 1, 2, 3, 4…. N.

Operations can be defined as the manipulation performed on numbers. There are four basic operations which are Addition, Subtraction, Multiplication, Division

In today’s topic we will only discuss Addition and Subtraction. So we will start with the Addition first.

Addition is the operation to total something. Here by total we mean to join two or more numbers (also read rational numbers worksheet). Symbol + is used to denote the operation of addition.

Example:

Suppose we have two numbers “A” and “B” and “R” is the total after the addition operation. So the Addition operation is defined as:

                        A + B = R

And in words “ A plus B equals to R ”.

Now putting numbers in place of  A, B and R.

We will start with the simplest one.

Single digit addition:

                                    1 + 1 = 2

                                    3 + 5 = 5 + 3 = 8

                                    4 + 3 = 3 + 4 = 7

Have you noticed something in above examples. No! If we change the order of number then the result will not be affected. It will remain the same.          

Two digits addition

                                    10 + 3 = 13

                                    25 + 24 = 49

                                    60 + 20 = 80

Similarly we can add “n” digit numbers.

By following the process below

Step 1: arrange the digits of the number in column form.

Step 2: Now add it as the single digit number starting from right to left. And if carry is generated then count it on the column left to it and put the result in the last row.

Example:

                        Add 123+345+789

               1 2 3

            +  3 4 5

            +  7 8 9

        -------------------

             1 2 5 7

Subtraction is the operation to taking something. Symbol minus (–) is used to denote the operation of subtraction.

Example:

Suppose we have two numbers “A” and “B” and “R” is the result after the subtraction operation. So the subtraction operation is defined as:

                        A - B = R

And in words “ A minus B equals to R ”.

Now putting numbers in place of A, B and R.

We will start with the simplest one.

Single digit subtraction:

                                    4 - 1 = 3 but 1 – 4 = -3

                                    5 - 3 = 2 but 3 – 5 = -2

                                    4 - 3 = 1 but 3 – 4 = -1

Have you noticed something in above examples. No! If we change the order of number then the result will be changed too. That is the order of numbers are important.

Two digits subtraction:

                                    10 - 3 = 7

                                    25 - 24= 1

                                    60 - 20 = 40

Similarly we can subtract “n” digit numbers.

By following the process below:

Step 1: arrange the digits of the number in column form.

Step 2: Now subtract it as the single digit number starting from right to left. If the above number is smaller then the number down then take borrow from the number in left column.

Example:

            Subtract 987-342

              9 8 7

            - 3 4 2

          -------------

              6 4 5 

Isn't it very easy. It will take no time to get master. Just spent some little time and you will be perfect in it.

In upcoming posts we will discuss about Positive Numbers in Grade IV and Mathematical Reasoning. Visit our website for information on ICSE syllabus for business studies