Expanded Form with Decimal Point

Oct 13, 2025 by wbrum.org 101 views

Introduction

Decimals are a fundamental concept in mathematics, representing a number as a whole part and a fractional part. In this article, we will explore the expanded form of decimals, which is a way of expressing a decimal number as a sum of its place values. We will discuss two examples: four thousand fifty-three and two hundred sixty-nine thousandths, and 9,615.243.

Expanded Form of Decimals

The expanded form of a decimal number is a way of expressing it as a sum of its place values. Each place value is multiplied by its corresponding digit, and the results are added together. The expanded form of a decimal number can be written in two ways: with the decimal point and without the decimal point.

Expanded Form with Decimal Point

When writing the expanded form of a decimal number with the decimal point, we separate the whole part from the fractional part. The whole part is written as a sum of its place values, and the fractional part is written as a sum of its place values multiplied by the corresponding power of 10.

Expanded Form without Decimal Point

When writing the expanded form of a decimal number without the decimal point, we simply write the sum of its place values.

Example 1: Four Thousand Fifty-Three and Two Hundred Sixty-Nine Thousandths

Let's consider the decimal number four thousand fifty-three and two hundred sixty-nine thousandths. We can write it in expanded form as follows:

4,053.269

Expanded Form with Decimal Point:

4,000 = 4 × 1,000
50 = 5 × 10
3 = 3 × 1
0.2 = 2 × 0.1
6 = 6 × 0.01
9 = 9 × 0.001

Expanded Form without Decimal Point:

4,000 + 50 + 3 + 0.2 + 0.06 + 0.009

Example 2: 9,615.243

Let's consider the decimal number 9,615.243. We can write it in expanded form as follows:

9,615.243

Expanded Form with Decimal Point:

9,000 = 9 × 1,000
6 = 6 × 10
1 = 1 × 1
5 = 5 × 0.1
0.2 = 2 × 0.1
4 = 4 × 0.01
3 = 3 × 0.001

Expanded Form without Decimal Point:

9,000 + 6 + 1 + 5 + 0.2 + 0.04 + 0.003

Conclusion

In this article, we have discussed the expanded form of decimals, which is a way of expressing a decimal number as a sum of its place values. We have considered two examples: four thousand fifty-three and two hundred sixty-nine thousandths, and 9,615.243. We have written the expanded form of each decimal number with and without the decimal point. The expanded form of a decimal number can be used to perform calculations and to understand the value of a decimal number.

Key Takeaways

The expanded form of a decimal number is a way of expressing it as a sum of its place values.
The expanded form of a decimal number can be written with and without the decimal point.
The expanded form of a decimal number can be used to perform calculations and to understand the value of a decimal number.

References

"Decimal Numbers" by Math Open Reference
"Decimals" by Khan Academy
"Expanded Form of Decimals" by Mathway
Expanded Form of Decimals: A Comprehensive Guide =====================================================

Q&A: Expanded Form of Decimals

Frequently Asked Questions

In this article, we will answer some of the most frequently asked questions about the expanded form of decimals.

Q: What is the expanded form of a decimal number?

A: The expanded form of a decimal number is a way of expressing it as a sum of its place values. Each place value is multiplied by its corresponding digit, and the results are added together.

Q: How do I write the expanded form of a decimal number with the decimal point?

A: To write the expanded form of a decimal number with the decimal point, you separate the whole part from the fractional part. The whole part is written as a sum of its place values, and the fractional part is written as a sum of its place values multiplied by the corresponding power of 10.

Q: How do I write the expanded form of a decimal number without the decimal point?

A: To write the expanded form of a decimal number without the decimal point, you simply write the sum of its place values.

Q: What is the difference between the expanded form of a decimal number with and without the decimal point?

A: The main difference between the expanded form of a decimal number with and without the decimal point is the way the fractional part is written. With the decimal point, the fractional part is written as a sum of its place values multiplied by the corresponding power of 10. Without the decimal point, the fractional part is written as a sum of its place values.

Q: Can I use the expanded form of a decimal number to perform calculations?

A: Yes, you can use the expanded form of a decimal number to perform calculations. By writing the decimal number in expanded form, you can easily add, subtract, multiply, and divide it.

Q: How do I use the expanded form of a decimal number to perform calculations?

A: To use the expanded form of a decimal number to perform calculations, you simply add, subtract, multiply, or divide the place values as you would with whole numbers.

Q: What are some examples of the expanded form of a decimal number?

A: Here are some examples of the expanded form of a decimal number:

4,053.269: 4,000 + 50 + 3 + 0.2 + 0.06 + 0.009
9,615.243: 9,000 + 6 + 1 + 5 + 0.2 + 0.04 + 0.003

Q: Can I use the expanded form of a decimal number to understand the value of a decimal number?

A: Yes, you can use the expanded form of a decimal number to understand the value of a decimal number. By writing the decimal number in expanded form, you can see the place values and understand how they contribute to the overall value of the decimal number.

Q: How do I use the expanded form of a decimal number to understand the value of a decimal number?

A: To use the expanded form of a decimal number to understand the value of a decimal number, you simply look at the place values and see how they contribute to the overall value of the decimal number.

Conclusion

In this article, we have answered some of the most frequently asked questions about the expanded form of decimals. We have discussed how to write the expanded form of a decimal number with and without the decimal point, how to use the expanded form of a decimal number to perform calculations, and how to use the expanded form of a decimal number to understand the value of a decimal number.

Key Takeaways

The expanded form of a decimal number is a way of expressing it as a sum of its place values.
The expanded form of a decimal number can be written with and without the decimal point.
The expanded form of a decimal number can be used to perform calculations and to understand the value of a decimal number.

References

"Decimal Numbers" by Math Open Reference
"Decimals" by Khan Academy
"Expanded Form of Decimals" by Mathway