Writing numbers in digits
Writing numbers in digits from word form is a Grade 4 skill in Saxon Math Intermediate 4 Chapter 4. Students use the words million and thousand as comma-placement signals and build the number in three-digit sections. Each section except the first must contain exactly three digits, with placeholder zeros filling any empty positions. For example, fifty-three million, six thousand, four hundred twenty is written as 53,006,420. Without placeholder zeros, a number like eight million, one hundred would incorrectly appear as 8,100 instead of the correct 8,000,100.
Key Concepts
Property 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.
Example 1. 'Fifty two million' is written as $52,000,000$. 2. 'Six million, three hundred fifty thousand' is written as $6,350,000$. 3. 'Two hundred ten million, seven hundred' is written as $210,000,700$.
Explanation 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!
Common Questions
How do I write a large number in digits from its word form?
Use million and thousand as signals for comma placement. Write each section with three digits, adding leading zeros if needed. Combine the sections.
How do I write fifty-three million, six thousand, four hundred twenty in digits?
Millions: 53. Thousands: 006 (six needs two leading zeros). Ones: 420. Combined: 53,006,420.
Why are placeholder zeros important?
Each section (except the first) must have exactly three digits. Without zeros, the number shifts to the wrong place value. Eight million, one hundred must be 8,000,100, not 8,100.
What does each section in a large number represent?
The rightmost section is ones, the middle section is thousands, and the leftmost section is millions. Each section holds exactly three digits.
How do I write eight million, fifty-four thousand, seven in digits?
Millions: 8. Thousands: 054 (leading zero needed). Ones: 007 (two leading zeros needed). Combined: 8,054,007.