In this Grade 4 lesson from Saxon Math Intermediate 4, students learn to read and write whole numbers through hundred millions using standard form, word form, and short word form. The lesson covers how to place commas correctly in seven-, eight-, and nine-digit numbers, use zeros as placeholders, and compare or order large numbers by place value. Practice includes converting between digit and word forms for numbers such as 12,345,678 and two million, three hundred thousand.
Section 1
📘 Writing Numbers Through Hundred Millions
To write a whole number with seven, eight, or nine digits, we use another comma to indicate millions.
Next, you’ll practice writing numbers in the millions using digits and words, and then compare their values.
Section 2
Whole-Number Place Values
To write a whole number with seven to nine digits, use commas to separate groups of three digits, starting from the right. The first comma from the right marks the 'thousand' place, and the second comma marks the 'million' place, making large numbers easier to read.
Think of commas as road signs for your numbers. The first one you pass yells 'THOUSAND!' and the second, even bigger one, shouts 'MILLION!' This system helps you read gigantic numbers without getting lost. It breaks them down into smaller, three-digit chunks, making a number like one hundred million way less scary than it looks. It's like a GPS for numbers!
Section 3
Writing numbers in words
To write a number in words, first read the digits to the left of the millions comma and say 'million'. Next, read the three digits between the commas and say 'thousand'. Finally, read the last three digits to complete the number's name. It's a three-step reading process.
Ready to become a number translator? First, add your commas every three spots from the right. Read the number chunk before the 'millions' comma, say the word 'million,' then read the chunk before the 'thousands' comma and say 'thousand.' Finally, just read the last part. It's like telling a story, one chunk at a time, with commas as your chapter breaks!
Section 4
Writing numbers in digits
When writing a number from its word form, use the words 'million' and 'thousand' as signals to place your commas. Start with the millions, then thousands, then the final three digits. Fill any empty sections with zeros to ensure each section (except the very first) has three digits.
Think of it as building a number with blocks. The word 'million' tells you where to put the first big comma, and 'thousand' shows where the next one goes. Just write the numbers you hear in their correct sections. If a section is empty, like no hundreds or tens are mentioned, fill those spots with zeros to hold their place correctly!
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Section 1
📘 Writing Numbers Through Hundred Millions
To write a whole number with seven, eight, or nine digits, we use another comma to indicate millions.
Next, you’ll practice writing numbers in the millions using digits and words, and then compare their values.
Section 2
Whole-Number Place Values
To write a whole number with seven to nine digits, use commas to separate groups of three digits, starting from the right. The first comma from the right marks the 'thousand' place, and the second comma marks the 'million' place, making large numbers easier to read.
Think of commas as road signs for your numbers. The first one you pass yells 'THOUSAND!' and the second, even bigger one, shouts 'MILLION!' This system helps you read gigantic numbers without getting lost. It breaks them down into smaller, three-digit chunks, making a number like one hundred million way less scary than it looks. It's like a GPS for numbers!
Section 3
Writing numbers in words
To write a number in words, first read the digits to the left of the millions comma and say 'million'. Next, read the three digits between the commas and say 'thousand'. Finally, read the last three digits to complete the number's name. It's a three-step reading process.
Ready to become a number translator? First, add your commas every three spots from the right. Read the number chunk before the 'millions' comma, say the word 'million,' then read the chunk before the 'thousands' comma and say 'thousand.' Finally, just read the last part. It's like telling a story, one chunk at a time, with commas as your chapter breaks!
Section 4
Writing numbers in digits
When writing a number from its word form, use the words 'million' and 'thousand' as signals to place your commas. Start with the millions, then thousands, then the final three digits. Fill any empty sections with zeros to ensure each section (except the very first) has three digits.
Think of it as building a number with blocks. The word 'million' tells you where to put the first big comma, and 'thousand' shows where the next one goes. Just write the numbers you hear in their correct sections. If a section is empty, like no hundreds or tens are mentioned, fill those spots with zeros to hold their place correctly!
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter