How do commas help us read and write numbers? How do I write 45,321 in word form?

In this lesson, you will learn how to read and write numbers in word form by understanding the role of commas.

Let’s Review MillionsThousandsOnes Hundred Millions Ten Millions Millions Hundred Thousands Ten Thousands Thousands Hundreds Tens Ones

Let’s Review Add a “ty” to groups of ten (20 – 90) when writing numbers in word form. For Example: twenty fifty ninety

A Common Mistake Forgetting to use a hyphen between tens and units. For example: Two hundred fifty-six Five hundred eighty-eight thousand

Let’s Review A Common Mistake Inserting “and” when reading and writing numbers without decimals. For example: 1,405 “one thousand, four hundred and five”

Let’s Review Core Lesson six million, three hundred twelve thousand, four hundred forty-five MillionsThousandsOnes Hundred Millions Ten Millions Millions Hundred Thousands Ten ThousandsThousands Hundreds Tens Ones 6,312,445

Let’s Review Core Lesson three hundred fifteen thousand, twenty-four million, MillionsThousandsOnes Hundred Millions Ten Millions Millions Hundred Thousands Ten ThousandsThousands Hundreds Tens Ones five hundred twenty-nine 4,529,315 2

Let’s Review Core Lesson 3 1 5, 7 7 6, thousands millions three hundred fifteen million, seven hundred seventy-six thousand, two hundred eighty-three

In this lesson, you have learned how to read and write numbers in word form by understanding the role of commas.

Let’s Review Guided Practice Write the number 67,982,321 in word form.

Let’s Review Extension Activities Go online and search for the population of your city. Write this number in numeric and word form.

Let’s Review Extension Activities Search the newspaper or ads for your dream home or dream car. How much does it cost? Write this number in word form.

Let’s Review Quick Quiz 1) If you were talking on the phone with a friend, how would you say the following number: 172,844?

Let’s Review Quick Quiz 2) Write the number 3,576,312 in word form.