Decimals: writing it out in words 2 | Decimals | Pre-Algebra | Khan Academy

TL;DR

Learn how to pronounce and write large numbers, including decimal and fraction parts.

Transcript

So I'm going to write out a number that we're going to think about how we could say or actually write that number. So I'm just going to write it out. I'm going to resist the temptation to actually speak it out because that's normally how I operate. But I'm not going to do that right now. So there's several ways that we can pronounce. So I encourage... Read More

Key Insights

• 🥳 Large numbers can be written and pronounced in different ways, depending on the decimal and fraction parts.
• 🥳 Merging decimal and fraction parts in terms of a common denominator can simplify the representation.

Questions & Answers

Q: How can we pronounce the number 20,000 and 5/10 and 7/1000?

The number can be pronounced as "twenty thousand and five tenths and seven thousandths."

Q: How can we write the number 20,000 and 5/10 and 7/1000?

The number can be written as 20,000.5 + 0.007 or as 20,000 + 507/1000.

Q: What are the different ways to represent the decimal and fraction parts of large numbers?

Large numbers can be represented by separating the whole number, decimal part (in tenths, hundredths, etc.), and fraction part (in thousandths, millionths, etc.).

Q: How can we merge the decimal and fraction parts to simplify the representation?

We can convert the decimal part to the same denominator as the fraction part, and then combine them. For example, 5/10 can be written as 500/1000, and 7/1000 remains the same, giving us 507/1000.

Summary & Key Takeaways

• The video teaches different ways to pronounce and write a large number: 20,000 and 5/10 and 7/1000.

• Another way to represent the same number is 20,000 and 507/1000.

• Understanding how to merge decimal and fraction parts can simplify the representation of large numbers.