Add – Definition with Examples

What Is Add?

The first mathematical operation that students are introduced to in elementary mathematics is addition. To add means to bring together or combine two objects. Students then build over this understanding to learn how to add more than two numbers. In higher grades, addition is the basic element to understand more complex operations like multiplication and division. The addition has an infinite number of applications in our day-to-day life. We use addition while cooking food, while calculating bills at supermarkets, while calculating distances, and much more.

Basics of Addition

Let’s look at this with the help of an example.

Let’s say we have two yellow stars.

two yellow stars

And three purple stars.

three purple stars

In order to find the total number of stars we have, we count all the stars together. That is, together we have 5 stars.

Mathematically, we write this as  

2 + 3 = 5

Here, “+” denotes addition. The total that we get on adding two or more numbers is also called the sum. Therefore, in this example, 5 is the sum of 2 and 3.

Considering one more example, if we add the numbers 6 and 4, we get the sum 10; and we write this as
6 + 4 = 10

Addition Methodologies

In their quest to master addition, students start by learning how to add one-digit numbers using their fingers or the number line and then move on to adding bigger numbers using the place value or column method. Let’s take a look at how these methods work.

Add Using Fingers

Let’s say we have to add the numbers 5 and 3.

Step 1: Show 5 fingers on one hand and 3 on the other.

Add Using Fingers five and three

Step 2: Start counting the fingers together like this to find the total.

Add Usinf fingers

And we have our total 

5 + 3 = 8.

Add by Counting Forward:

Let’s use another example to see how this strategy works, Let’s say we have to add the numbers 5 and 4.

Step 1: Keep the bigger number in mind. In this case, 5.

Step 2: Count forward as many times as the second number, i.e., 4 times. 

Like this: 6 – 7 – 8 – 9. We get 9. 

So, 4 added to 5 is 9 or the sum of 5 and 4 is 9. 

Using Number Line:

Let’s see how we can add the numbers 11 and 3 using a number line.

Step 1: Mark the bigger number on the number line.

Bigger Number on number line

Step 2: Jump forward as many times as the second number.

jump forward on number line

And so we have 

11 + 3 = 14

Using the Column Method:

This method is most commonly used to add two-digit or greater numbers using their place value. This method has two aspects to itself, one where we need regrouping and one where we add without having to regroup. Let’s look at the latter first.

Without Regrouping:

Let’s add the numbers 34 and 52. 

Step 1: Write the numbers one below the other as per their place value like this:

add the numbers as per their place value

Step 2: Start from the right and add the digits in the ones column first.

add digits in column firts

 Step 3: Move on to the next column and add the digits in the tens column.

Add the digits in the tens column.

And so we have our answer:
34 + 52 = 86

With Regrouping:

This is the aspect that comes into play when the sum of the digits in any column exceeds 9. 

Let’s try adding the numbers 29 and 46 using this method.

Step 1: Write the numbers one below the other as per their place value like this:

add the numbers as per their place value with Regrouping

Step 2: As done previously, start from the right and add the digits in the ones column first. Here the sum of 9 and 6 will be 15. We think of 15 as 10 + 5; keep the 5 in the ones column, and give the 10 as 1 ten to the tens column as a carryover.

add the digits in the ones column first

Step 3: Move on to the tens column and add the digits in this column along with the carryover digit to find the answer.

Add the digits in the tens column

And so we have our sum: 29 + 46 = 75

Properties of Addition

  1. Commutative Property of Addition

We can swap the numbers in an addition equation and the sum will remain the same.

19 + 14 = 33  

14 + 19 = 33

  1. Identity Property of Addition

When zero is added to a number or a number is added to zero, the sum is the number itself.

15 + 0 = 15

0 + 15 = 15

  1. Associative Property of Addition

While adding three or more numbers, the sum of the numbers does not depend on the order in which the numbers are added. For example, we could add the numbers 5, 8, and 6 in different ways like this:

(5 + 8) + 6 = 13 + 6 = 19

5 + (8 + 6) = 5 + 14 = 19

8 + (5 + 6) = 8 + 11 = 19

Solved Examples in Addition:

Example 1: Add 56 and 11 using the column method.

Solution

Add – Definition with Examples

Example 2: Add 4 and 6 on number line.

Solution:

solved example of number line

4 + 6 = 10

Example 3: Find the missing number in 7 + ___ = 9

Solution: 7 + 2 = 9.

Example 4: Add and write the total number of fingers.

Find the total numbers of fingers

Solution: 2 + 5 = 7.

Practice Problems

Add

Attend this Quiz & Test your knowledge.

1Which property is shown by the addition sentence 11 + 0 = 11?

Associative property
Identity property
Associative property
Distributive property
CorrectIncorrect
Correct answer is: Identity property
The sum of any number and zero is the number itself.

2Add: 5 + 7 + 9.

20
12
14
21
CorrectIncorrect
Correct answer is: 21
$5 + 7 + 9 = (5 + 7) + 9 = 12 + 9 = 21$

3A bouquet has 36 red roses and 18 white roses. How many roses does the bouquet have in all?

54
72
36
108
CorrectIncorrect
Correct answer is: 54
Number of red roses = 36, Number of white roses = 18, Total number of roses = 36 + 18 = 54

4Bus A has 45 passengers, Bus B has 56 passengers and Bus C has 32 passengers. How many passengers are on Bus A and Bus C?

101
88
77
133
CorrectIncorrect
Correct answer is: 77
Number of passengers in Bus A = 45, Number of passengers in Bus C = 32, Number of passengers on Bus A and Bus C = 45 + 32 = 77

Frequently Asked Questions

To find the total number of objects, bill amount, or total distance traveled.

Addition is one of the basic arithmetic operations. Addition means to combine different objects and find the total.

1 added to a number gives the successor of the number.

When 1 is subtracted from a number, we get the predecessor of the number.

The method of counting forward by numbers other than 1 is defined as skip counting. 
For example, starting from 10, skip counting would mean adding 5 to each new number we get like this: 10, 15, 20, 25, 30…