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In this topic, we will learn what a decimal is and how to show it visually and on a number line. We will also add, subtract, multiply, and divide with decimals.

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Sal introduces decimal numbers and understanding place value to the right of the decimal.

"The decimal point was invented around the 1440s by Italian mathematician and merchant Giovanni Bianchini. Bianchini used the decimal point in his work as an astronomer and court …

Want to learn more about decimal place value? Check out this video. Want to review whole number place value? Check out this article.

What are decimals? Decimals are a way of writing numbers that include parts of a whole. They are written with a decimal point to separate the whole number from the fractional part. For …

So I encourage you to pause the video and say and think about how would you represent 1/5 as a decimal. Well, there's a bunch of ways that you could think about it.

This video introduces multiplying decimals, emphasizing the role of decimal placement in the product. It highlights the usefulness of estimation in simplifying calculations and understanding …

Practice writing decimal numbers in word form and number form.