Enter comma-sepearated values and click calculate button to calculate their sum by using long addition calculator

The long addition calculator is an online tool to add long numbers quickly. You can add small numbers at your fingertips but when it comes to adding long numbers, you will forget some digits in between and ruin your calculation. This addition method calculator not only adds the long whole numbers but also sum up the long decimal numbers.

You can now add all types of long numbers with one click. All you have to do is enter your numbers and it will do the rest for you.

Let’s discuss how to add calculator works and how you do a long addition.

## How to use a long addition calculator?

To use this sum calculator, follow the steps below:

• Place the whole numbers or decimals numbers in the given input box.
• Separate each number by using a comma.
• Hit the Calculate button to see the result.
• Use the Reset button to add new numbers.

The summation calculator will give you the added long numbers in no time. If you need to convert long numbers into million or billion, you can use our Power 10 Numbers Conversion Calculator.

## How do you add long numbers?

• Write each number horizontally in columns one under another as shown in the image below.
• Start adding numbers from the right side. Add the numbers of each column from right to left and write the answer of each column beneath the column.
• If an addition results in a number greater than 9, then write the place one digit (right-sided) beneath the column and carry the tens place digit (left-sided) to the next column.
• Add the carry and all numbers of the next column and repeat the step for each column.

You can always use the summation solver above to add long numbers. Let’s add a few long numbers using examples.

### Example – Adding whole numbers

Add these numbers: 1078, 945, 121, and 790.

Solution:

Step 1: Write each number horizontally in columns one under another.

 1 0 7 8 9 4 5 1 2 1 + 7 9 0

Step 2: Start adding numbers from the right side. Add the numbers of each column from right to left and write the answer of each column beneath the column.

 1 0 7 8 9 4 5 1 2 1 + 7 9 0

Step 3: If an addition results in a number greater than 9, then write the place one digit (right-sided) beneath the column and carry the tens place digit (left-sided) to the next column.

 1 0 7 1 8 9 4 5 1 2 1 + 7 9 0 4

Step 4: Add the carry and all numbers of the next column and repeat the step for each column.

 1 1 0 2 7 1 8 9 4 5 1 2 1 + 7 9 0 2 9 3 4

### Example – Adding decimal numbers

What is the sum of these numbers?

736.39, 423.07, 23.567

Solution:

Step 1: Write each number horizontally in columns one under another. Make sure the decimal of each number is aligned in the columns like below.

 7 3 6 . 3 9 4 2 3 . 0 7 + 2 3 . 5 6 7

Step 2: Add from the right side of the column and make sure to place the decimal in the result when writing added numbers. Carry the additional number the same as in the previous example. Repeat this step until the last column.

 7 3 1 6 1 . 3 2 9 4 2 3 . 0 7 + 2 3 . 5 6 7 11 8 3 . 0 2 7