# How to Add Decimals Examples, Worksheet, and Definition

Get the free Adding Decimals worksheet and other resources for teaching & understanding how to Add Decimals

### Key Points

• Adding decimals is a crucial mathematical skill used in various fields.
• The rules for adding decimals include lining up the decimal points, putting zeros in the empty spaces, and adding the numbers as usual.
• Adding decimals with whole numbers is relatively straightforward, but adding decimals with fractions can be a bit more complicated.

## The Easy Method for Adding Decimals

Adding Decimals is an essential mathematical skill that is used in various fields, including finance, science, engineering, and more. It is a fundamental operation that involves combining two or more decimal numbers to find their sum. While adding decimals is similar to adding whole numbers, there are a few rules that need to be followed to obtain the correct answer.

The rules for adding decimals include lining up the decimal points, putting zeros in the empty spaces, and adding the numbers as usual. It is essential to ensure that the decimal points are aligned correctly, or the answer will be incorrect. Adding decimals with whole numbers is relatively straightforward. However, adding decimals with fractions can be a bit more complicated and requires a thorough understanding of fractions and decimals.

Adding Decimals is the process of adding two numbers that are decimals together. When Adding Decimals you will put one number above the other number. When you do this, you must make sure the decimal in each number is lined up vertically. You need to add a zero to any blank space that does not have a number so that both decimals are the same length. The last step for finding how to add decimals is to add the decimals together through column addition. Make sure that the decimal gets moved down in the same spot as it was lined up in.

Common Core Standard: 6.NS.3
Related Topics: Subtracting Decimals, Multiplying Decimals, Dividing Decimals, Greatest Common Factor, Least Common Multiple Adding decimals is a fundamental operation in mathematics. Here are some basic rules for adding decimals:

1. Line up the decimal points. When adding decimals, it is essential to line up the decimal points. This makes it easier to add the numbers and ensures that the decimal point is in the correct place in the answer.
2. Add zeros if necessary. If the decimals have a different number of digits, add zeros to the end of the shorter decimal until they have the same number of digits. For example, when adding 1.2 and 0.05, add a zero to the end of 0.05 to make it 0.050. Then, line up the decimal points and add as usual.
3. Add the digits. Once the decimals are lined up, add the digits in each column, starting from the rightmost column. If the sum of the digits in a column is greater than 9, carry the 1 to the next column.
4. Place the decimal point. Once all the digits are added, place the decimal point in the answer directly below the decimal points in the numbers being added.

Here is an example of adding decimals using these rules:

``````  3.14
+ 0.26
------
3.40
``````

In this example, the decimal points are lined up, and zeros are added to the end of 0.26 to make it 0.260. Then, the digits are added column by column, and the decimal point is placed in the answer directly below the decimal points in the numbers being added.

Following these rules will help ensure that decimals are added correctly and that the decimal point is in the correct place in the answer.

## How to Add Decimals with Whole Numbers in 4 Simple Steps

Adding decimals with whole numbers is a straightforward process. Here are the steps to follow:

1. Write down the whole number and the decimal number one below the other, with the decimal points aligned.For example, to add 5 and 0.23, write:
`````` 5.00
+0.23``````
1. If the decimal numbers have different lengths, add zeros to the end of the shorter decimal number until they have the same length.For example, to add 5 and 0.7, write:
`````` 5.00
+0.70
``````
1. Add the numbers as you would with whole numbers, starting from the rightmost column.
`````` 5.00
+0.23
-----
5.23``````
``````5.00
+0.70
-----
5.70``````

4. Write the answer with the decimal point in the same position as in the original numbers. 0.70

It’s important to remember to keep the decimal points aligned with adding decimals with whole numbers. Adding zeros to the shorter decimal number ensures that both numbers have the same length, making it easier to add them.

## 3 Quick Adding Decimals Examples

Adding decimals is an essential skill in mathematics, especially when dealing with money, measurements, and scientific calculations. Here are some examples of adding decimals:

Example 1: Add 3.25 and 0.075

To add these decimals, line up the decimal points and add the digits in each column. If there are any missing digits, add zeros to fill in the gaps.

``````   3.250
+  0.075
-------
3.325
``````

Therefore, the sum of 3.25 and 0.075 is 3.325.

Example 2: Add 9.087 and 15.31

To add these decimals, follow the same process as in Example 1.

``````   9.087
+ 15.310
-------
24.397
``````

Therefore, the sum of 9.087 and 15.31 is 24.397.

Example 3: Add 1.452, 1.3, and 5

``````   1.452
+  1.300
-------
2.752
+  5.000
-------
7.752
``````

Therefore, the sum of 1.452, 1.3, and 5 is 7.752.

In summary, adding decimals involves lining up the decimal points and adding the digits in each column. It is a fundamental skill that is useful in various fields, and the examples above illustrate how to add decimals step-by-step.

## 5 Challenging Adding Decimals Practice Problems

/5

Click Start to begin the practice quiz!

1 / 5

1.4 + 9.05

2 / 5

8.7 + 4.8

3 / 5

3.5 + 9.1

4 / 5

1.75 + 4.93

5 / 5

1.2 + 8.4

0%

Adding decimals and fractions can be challenging for many students. However, with some practice and understanding of the basic rules, it can become an easy task.

To add decimals, one must first write down the numbers one under the other, with the decimal points lined up. Then, if the numbers have a different number of decimal places, zeros must be added to make them the same length. Finally, add the numbers using column addition, remembering to put the decimal point in the answer. For example, to add 1.452 to 1.3, one would write:

``````  1.452
+ 1.300
-------
2.752
``````

To add fractions, one must first find the common denominator. This is the least common multiple of the denominators of the fractions. Then, the fractions must be converted to have the same denominator. Finally, add the numerators and simplify the result if necessary. For example, to add 1/3 and 1/4, one would follow these steps:

1. Find the common denominator: 3 and 4 have a common multiple of 12, so the common denominator is 12.
2. Convert the fractions to have the same denominator: 1/3 becomes 4/12 and 1/4 becomes 3/12.
3. Add the numerators: 4/12 + 3/12 = 7/12.
4. Simplify the result if necessary: 7/12 is already in its simplest form.

To add decimals and fractions, one must first convert the decimals to fractions. This is done by placing the decimal over a power of ten and simplifying the resulting fraction. For example, 0.25 becomes 25/100, which simplifies to 1/4. Then, the fractions can be added using the method described above. For example, to add 0.25 and 1/3, one would follow these steps:

1. Convert the decimal to a fraction: 0.25 becomes 1/4.
2. Find the common denominator: 3 and 4 have a common multiple of 12, so the common denominator is 12.
3. Convert the fractions to have the same denominator: 1/4 becomes 3/12.
4. Add the numerators: 3/12 + 4/12 = 7/12.
5. Simplify the result if necessary: 7/12 is already in its simplest form.

Overall, adding decimals and fractions requires understanding the basic rules and practicing the methods. With time and effort, it can become a simple and easy task.

Adding decimals can be a tricky concept for many students. However, word problems can help make the concept more relatable and easier to understand. Word problems are a great way to help students see how decimals are used in real-life situations.

When solving adding decimals word problems, it is important to remember to line up the decimal points. This will ensure that the numbers are added correctly. Students can use a variety of strategies to solve the problems, including mental math, estimation, and using a calculator.

Here are a few examples of adding decimals word problems:

• Sarah spent \$12.50 on lunch and \$7.25 on a movie ticket. How much money did she spend in total?
• A recipe calls for 0.75 cups of sugar and 0.5 cups of flour. How much of these ingredients are needed in total?
• A car travels 25.5 miles on Monday and 16.75 miles on Tuesday. How many miles did the car travel in total?

These word problems can help students see how decimals are used in everyday situations. They can also help students develop problem-solving skills and improve their math abilities.

Overall, adding decimals word problems are a great way for students to practice their math skills and learn how decimals are used in real-life situations. By using a variety of strategies and practicing regularly, students can become more confident in their ability to add decimals and solve word problems.

### What are some examples of adding decimals with different decimal places?

Adding decimals with different decimal places is a common task in math. For example, adding 0.5 and 0.25 requires lining up the decimal points and adding the digits in each column. In this case, the answer is 0.75. Similarly, adding 1.23 and 0.456 requires lining up the decimal points and adding the digits in each column. The answer is 1.686.

### How do you add two decimal numbers?

To add two decimal numbers, line up the decimal points and add the digits in each column. Then, place the decimal point in the answer directly below the decimal points in the numbers being added. For example, to add 2.35 and 1.27, line up the decimal points and add the digits in each column to get 3.62.

### What is the process for adding and subtracting decimals?

The process for adding and subtracting decimals is similar. First, line up the decimal points and add or subtract the digits in each column. Then, place the decimal point in the answer directly below the decimal points in the numbers being added or subtracted. Remember to carry over any digits to the next column if the sum or difference is greater than 9. For example, to subtract 3.21 from 5.43, line up the decimal points and subtract each column to get 2.22.

### What are some common mistakes when adding decimals?

One common mistake when adding decimals is forgetting to line up the decimal points. This can result in an incorrect answer. Another mistake is forgetting to carry over any digits to the next column if the sum is greater than 9. This can also result in an incorrect answer. It is important to double-check the alignment of the decimal points and the accuracy of the answer.

### How do you add decimals with negative numbers?

To add decimals with negative numbers, first add the absolute values of the numbers as if they were positive. Then, if the signs of the original numbers were different, subtract the smaller absolute value from the larger absolute value and use the sign of the larger number. For example, to add -2.5 and 1.8, first add 2.5 and 1.8 to get 4.3. Then, since the signs of the original numbers were different, subtract 1.8 from 2.5 to get 0.7 and use the sign of the larger number, which is negative.

### What are some real-world applications of adding decimals?

Adding decimals has many real-world applications, such as calculating prices and taxes when shopping, measuring ingredients when cooking, and calculating distances and times when traveling. It is also used in financial calculations, such as calculating interest rates and loan payments.

### Do you add decimals left or right?

When adding decimals, it is important to line up the decimal points and add the digits in each column from right to left. This ensures that the decimal point is placed correctly in the answer.

## Adding Decimals Worksheet Video Explanation

Watch our free video on how do you Add Decimals. This video shows how to solve problems that are on our free Adding Decimals worksheets that you can get by submitting your email above.

Video Transcript:

Let’s try a couple adding decimals examples from our decimal addition worksheets. The first problem on our adding decimals worksheet gives us 1.2 plus 8.4. Now we already know that we’re going to take the two numbers and line them up vertically. 1.2 plus 8.4. We have to line the decimals up and we know that our answer is going to have a decimal point in the same spot that the original decimals have once they’re lined up. Now that they’re lined up we can just add 2 plus 4 is 6 and then 1 plus 8 is 9. I know that the answer to this problem is going to be 9.6.

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