Writing whole numbers in word form means translating a base-ten numeral into a correctly structured number name by interpreting each digit’s place value and grouping digits into ones, thousands, and millions periods, up to 999,999,999. The representation preserves the quantity, omits place-value groups containing only zeros, and distinguishes values such as “five hundred six thousand” from “five hundred sixty thousand”; decimals, fractions, and names for numbers beyond this range are not included.
Detailed Explanation: Write whole numbers in word form
To write a whole number in word form:
Separate the number into groups of three digits, starting from the right. These groups are called periods:
millions
thousands
ones
Read each group as a three-digit number.
Add the period name after the millions or thousands group.
Skip any group that contains only zeros.
Use hyphens in numbers such as twenty-five.
Example: Write (406,025,018) in word form.
First, separate the periods:
406∣025∣018
(406) is in the millions period: four hundred six million
(025) is in the thousands period: twenty-five thousand
(018) is in the ones period: eighteen
Put the parts together:
four hundred six million twenty-five thousand eighteen
The zero in the thousands group does not mean the group is skipped, because the group contains (25). A group is skipped only when all three digits are zero.
Learn by doing: Write whole numbers in word form
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