Explanations:The spelling of large numbers in word form is a fundamental skill in English language proficiency, particularly in contexts where precise communication is necessary, such as in academic writing, legal documents, and financial reports. The process of converting a numerical value into its word form involves several key steps:
1. **Grouping Digits**: The first step is to group the digits into sets of three, starting from the right. Each set of three digits is called a "period." For the number 6,408,152, the periods are "6" (millions), "408" (thousands), and "152" (ones).
2. **Naming Each Period**: Each period is then named according to its place value. The rightmost period is named "ones," the next period to the left is named "thousands," and the next is named "millions." In our example, the periods are named as follows:
- "6" is in the millions place.
- "408" is in the thousands place.
- "152" is in the ones place.
3. **Spelling Each Period**: Each period is spelled out individually, and the appropriate name for the period is added after the spelled-out number. For the number 6,408,152:
- "6" is spelled as "six."
- "408" is spelled as "four hundred eight."
- "152" is spelled as "one hundred fifty-two."
4. **Combining the Periods**: The spelled-out periods are then combined, with the appropriate name for the period added after each spelled-out number. The correct spelling of 6,408,152 is "six million, four hundred eight thousand, one hundred fifty-two."
It is important to note that commas are used to separate the periods in the numerical form, and these commas correspond to the placement of the period names in the word form. For example, the comma in 6,408,152 separates the millions period from the thousands period, and the comma in the word form separates "six million" from "four hundred eight thousand."
Common mistakes in spelling large numbers include misplacing commas, which can lead to incorrect grouping of digits, and forgetting to include the appropriate period names. For instance, in the incorrect option "sixty-four million, eight thousand, one hundred fifty-two," the comma is misplaced, leading to an incorrect grouping of the digits. Similarly, in the incorrect option "six million, four hundred eighty-one thousand, five hundred two," the digits in the thousands place are misinterpreted, leading to an incorrect spelling.
Understanding and correctly applying these rules is crucial for accurately spelling large numbers in word form, ensuring clear and precise communication in various contexts.