Addition is considered as the basic arithmetic operation in which we find the sum of two numbers with any number of digits.

The addition operation is denoted by using the sign plus** “+”**.

Since addition is the basic arithmetic operation there are some properties such as **commutative property**, **associative property**, **zero property** and **identity property**.

For three digit addition a standard written method of column addition is used and practiced with examples.

(a) with no bridging

(b) bridging 10 only

(c) bridging 100 only

(d) bridging 10 and 100

Opportunity is provided for using mental and written applications for methods of adding three digit numbers.

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This involves the addition operation with the three digit numbers. The examples of the three digit addition is given here,

Step 1: In this given example first we should write the numbers in the form of addition.

2 5 4

+ 1 3 1

_______

_______

Step 2: Here we should add the digits in the ones place. i.e. we should add the numbers 4 and 1.

By adding 4 and 1 we get the answer 5 which is placed as shown below,

2 5 4

+ 1 3 1

_______

5

_______

Step 3: Then we should add the digits in the tens place. i.e. we should add the numbers 5 and 3 so that we get the answer 8.

2 5 4

+ 1 3 1

_______

8 5

________

Step 4: Then we should add the digits in the hundreds place. Add the numbers 2 and 1 so that we get the answer

2 5 4

+ 1 3 1

______

3 8 5

________

Hence after adding the given three digit number we obtain the answer as 385.

Step 1: First we write the numbers in the form of addition.

4 3 5

+ 5 3 4

_______

_______

Step 2: Here we should add the digits in the ones place. i.e. we should add the numbers 5 and 4.

By adding 5 and 4 we get the answer 9 which is placed as shown below,

4 3 5

+ 5 3 4

______

9

_______

Step 3: Then we should add the digits in the tens place. i.e. we should add the numbers 3 and 3 so that we get the answer 6.

4 3 5

+ 5 3 4

_______

6 9

_______

Step 4: Then we should add the digits in the hundreds place. Now we should add the numbers 5 and 4 so that we get the answer as,

4 3 5

+ 5 3 4

_______

9 6 9

_______

Hence the answer is 969.

Step 1: First we write the numbers in the form of addition.

6 2 8

+ 3 2 9

_______

_______

Step 2: Here we should add the digits in the ones place. i.e. we should add the numbers 8 and 9.

By adding 8 and 9 we get the answer 17 where 7 is placed as shown below and 1 is added with the next number,

6 2 8

+ 3 2 9

_______

7

_______

Step 3: Then we should add the digits in the tens place. i.e. we should add the numbers 2 and 2 so that we get the answer 4 which is added with 1 which is the remainder obtained from the previous step. Therefore the answer obtained is 5.

6 2 8

+ 3 2 9

_______

5 7

_______

Step 4: Then we should add the digits in the hundreds place. That is we should add the numbers 3 and 6 so that we get the answer.

6 2 8

+ 3 2 9

_______

9 5 7

_______

Hence the answer is 957

Hence the answer is 957

Given 579 + 423

__+ 423____ 2__

__+ 423____ 02__

__+ 423____ 1002__

Step 1: First add ones place, that is 9 + 3 = 12

579

Carry 1 to tens place

Step 2: Now add tens place, that is 7 + 2 = 9, add carried number here ( 1 + 9 = 10)

579

Carry 1 to hundreds place

Step 3: Add hundreds place, that is 5 + 4 = 9, add carried number here ( 1 + 9 = 10)

579

Given 874 + 589

__+ 589____ 3__

__+ 589____ 63__

__+ 589____ 1463__

Answer is 1463

Step 1: First add ones place, that is 4 + 9 = 13

874

Carry 1 to tens place

Step 2: Now add tens place, that is 7 + 8 = 15, add carried number here ( 1 + 15 = 16)

874

Carry 1 to hundreds place

Step 3: Add hundreds place, that is 8 + 5 = 13, add carried number here ( 1 + 13 = 14)

874

Answer is 1463

Below you could see three digit addition without regrouping

Given 568 + 421

__+ 421__

__ 9__

__+ 421____ 89__

__+ 421____ 989__

Hence answer is 989

Step 1: First add ones place, that is 8 + 1 = 9

568

Step 2 : Now add tens place, that is 6 + 2 = 8

568

Step 3: Add now hundredsplace, that is 5 + 4 = 9

568

Hence answer is 989

Given 215 + 472

__+ 472____ 7__

__+ 472____ 87__

__+ 472____ 687__

Step 1: First add ones place, that is 5 + 2 = 7

215

Step 2: Now add tens place, that is 1 + 7 = 8

215

Step 3: Add hundreds place, that is 2 + 4 = 6

215

Number of white colored sheets = 210

Number of red colored sheets = 104

Total number of sheets did David had = 210 + 104

= 314

David had 314 sheets.

Number of color marbles = 124

Number of white marbles = 137

Total number of marbles did jimmy had = 124 + 137

= 261

Jimmy had 261 marbles.

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