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Last updated on May 26th, 2025

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400 as a decimal

Professor Greenline Explaining Math Concepts

Understanding decimal representation is straightforward. A decimal represents a number using a base ten system, which includes a decimal point to distinguish the whole part from the fractional part. In this context, though, we are discussing whole numbers like 400, which can be directly represented as a decimal without any fractional component. The decimal point is followed by zero, indicating there is no fractional part.

400 as a decimal for Australian Students
Professor Greenline from BrightChamps

What is 400 as a decimal?

400 as a decimal

Answer

 

400 as a decimal is written as 400.0. It is a terminating decimal, meaning it does not repeat infinitely.

 

Explanation

 

To express 400 as a decimal, we simply place a decimal point followed by a zero, indicating that there are no fractional parts:

 

Step 1: Identify the whole number, which is 400.

 

Step 2: As there are no fractional components, append ".0" to the whole number.

 

Step 3: The result is 400.0, a terminating decimal.

Professor Greenline from BrightChamps

Important Glossaries for 400 as a decimal

  • Whole Number: A number without any fractional or decimal component.
     
  • Decimal: A number expressed using the base ten, including a decimal point to separate the whole number from any fractional part.
     
  • Terminating Decimal: A decimal number that has a finite number of digits after the decimal point.
     
  • Decimal Point: The dot used in decimal numbers to separate the whole part from the fractional part.
     
  • Fractional Part: The part of a decimal number that comes after the decimal point, representing a portion of a whole.
Professor Greenline from BrightChamps

About BrightChamps in Australia

At BrightChamps, math questions are more than just exercises—they’re opportunities to grow and explore! Our mission is to help children across Australia develop important skills, including today’s focus on the 400 as a decimal with special attention on decimal conversions—in a fun, lively, and easy-to-understand way. Whether your child is calculating the speed of a roller coaster at Luna Park Sydney, tracking scores at a local cricket match, or managing their allowance for the latest gadgets, strong math skills give them confidence for daily challenges. Our lessons are interactive and designed to be enjoyable. Since kids in Australia learn in various ways, we customize our teaching to meet their individual styles. From Sydney’s vibrant streets to the beautiful Gold Coast beaches, BrightChamps brings math to life, making it relatable and exciting throughout Australia. Let’s make decimal conversions a fun part of every child’s math journey!
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