This video tutorial teaches how to read and write numbers in word form by understanding the role of commas. It reviews the place value chart, emphasizing the importance of periods such as ones, thousands, and millions. The tutorial explains common mistakes like forgetting hyphens between tens and units and using 'and' incorrectly. It provides examples of writing numbers in word form, highlighting the need to insert words like 'million' and 'thousand' at commas. The lesson concludes with a final example and a summary of key points.

What is the primary role of commas in reading and writing numbers?

• To add emphasis

• To signify periods or units

• To indicate decimal points

• To separate digits

In a place value chart, what comes after the 'thousands' period?

• Hundreds

• Billions

• Tens

• Millions

Why is it important to add 'ty' to numbers like 20, 50, and 90?

• To make them sound better

• To indicate they are multiples of ten

• To differentiate them from single digits

• To follow grammatical rules

What common mistake do students make when writing numbers like 256?

• Inserting a comma

• Forgetting to add 'ty'

• Omitting the hyphen between tens and units

• Adding an extra zero

When writing the number 6,312,445 in word form, what word should be inserted at the first comma?

• Thousand

• Hundred

• Million

• Billion

How should numbers between 11 and 19 be written?

• As two separate words

• With a comma

• With a hyphen

• As one word

In the number 24,129,315, where should hyphens be inserted?

• Between 24 and 315

• Between tens and units in 24 and 29

• Between 129 and 315

• Between 24 and 129

What is the first step in writing a number without a place value chart?

• Separate periods with commas

• Insert commas randomly

• Write the number backwards

• Identify the largest digit

When writing 315,770,283 in word form, what word follows the first period?

• Million

• Billion

• Thousand

• Hundred

What is the final step in writing a number in word form?

• Add a period

• Insert commas

• Write the last period's value

• Add 'and' between numbers