1 1

5387     → Sum

The resulting number is called the sum. 2 or more than 2 numbers to be added are called addenda (plural form of addendum). Here 2438 and 2949 are addenda.

Addition of five-digit and six digit numbers:

We know how to add three-digit and four digit numbers. Now, we will learn to add larger numbers.

Consider the following examples:

1. Find the sum of 43428 and 46325.

Arrange the digits of the addenda in columns and add as usual.

1

89753  → Sum

The sum is 89753.

2. Find the sum of 58209 and 23490.

Arrange the digits of the addenda in columns and add as usual.

1

81699  → Sum

The sum is 81699.

3. Find the sum of 569438 and 234526.

Arrange the digits of the addenda in columns and add as usual.

11   1

803964                → Sum

The sum is 803964.

4. Find the sum of 669702, 154789 and 113465.

Arrange the digits of the addenda in columns and add as usual.

1

937956               → Sum

The sum is 937956.

We can add two numbers in any order. The sum remains the same. This property is also called commutative property.

For example:

Find the sum of 460721 and 237544.

Solution:

 460721 +237544   698265 Or 237544 +460721   698265

In both cases, the sum remains the same.

If zero is added to a number, the sum is the number itself. Zero is called additive identity.

For example:

Solution:

423456

+        0

423456

The sum is the number itself.

While adding three or more numbers we may group the numbers in any order. The

Sum remains the same. This is also called grouping property of addition.

For example:

Solution:

 First method   214061 +142131   356192     356192 +234250   590442 Second method   142131 +234250    376381     376381 +214061   590442

We see that (214061 + 142131) + 234250 = (142131 + 234250) + 214061.

1. Ron earns $27425 per month and Sam earns$24639 per month. How much do they earn per month together?

Solution:

Ron earns per month                       =   $27425 Sam earns per month = +$24639

They earns per month                     =    $52064 So, their total earnings per month =$52064

2. Jack has $14321, David has$21109 and John has $30201. How much money do they have together? Solution: Jack has =$14321

David has          =    $21109 John has = +$30201

Total amount     =    $65631 So, the amount they have together =$65631

Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

## Recent Articles

1. ### Time Duration |How to Calculate the Time Duration (in Hours & Minutes)

Apr 17, 24 01:32 PM

We will learn how to calculate the time duration in minutes and in hours. Time Duration (in minutes) Ron and Clara play badminton every evening. Yesterday, their game started at 5 : 15 p.m.

2. ### Worksheet on Third Grade Geometrical Shapes | Questions on Geometry

Apr 16, 24 02:00 AM

Practice the math worksheet on third grade geometrical shapes. The questions will help the students to get prepared for the third grade geometry test. 1. Name the types of surfaces that you know. 2. W…

3. ### 4th Grade Mental Math on Factors and Multiples |Worksheet with Answers

Apr 16, 24 01:15 AM

In 4th grade mental math on factors and multiples students can practice different questions on prime numbers, properties of prime numbers, factors, properties of factors, even numbers, odd numbers, pr…

4. ### Worksheet on Factors and Multiples | Find the Missing Factors | Answer

Apr 15, 24 11:30 PM

Practice the questions given in the worksheet on factors and multiples. 1. Find out the even numbers. 27, 36, 48, 125, 360, 453, 518, 423, 54, 58, 917, 186, 423, 928, 358 2. Find out the odd numbers.