How can we write 2.7 in words? Please choose from one of the following options.
A. Two and seven hundredths
B. Two and seven tenths
C. Two and seven oneths
The Correct Answer and Explanation is:
The correct answer is B. Two and seven tenths.
To understand why this is the case, it’s important to break down the number 2.7 into its components. The number consists of two parts: the whole number part (2) and the decimal part (0.7). In numerical terms, the number can be expressed as:
- Whole Number: The number before the decimal point, which in this case is 2.
- Decimal Portion: The number after the decimal point, which is 7.
The decimal number 0.7 can be interpreted as seven tenths. This is because the digit in the first decimal place represents tenths. Thus, the number 0.7 is equal to ( \frac{7}{10} ).
When writing decimal numbers in words, the whole number part is stated first, followed by the word “and,” and then the decimal part expressed in fractional terms. Therefore, for 2.7, we first write the whole number “two,” add “and,” and then state the decimal part as “seven tenths.”
To clarify the incorrect options:
- A. Two and seven hundredths: This would represent the number 2.07, as “hundredths” refers to the second decimal place. Since 2.7 is not in the hundredths, this option is incorrect.
- C. Two and seven oneths: This option is not a standard way to express decimals. The term “oneths” is not commonly used in mathematical language. The correct term for the first decimal place is “tenths,” not “oneths.”
In summary, the proper way to express 2.7 in words is “two and seven tenths.” This expression accurately reflects both the whole number and the decimal portion of the number in a mathematically correct manner. Understanding how to articulate decimal numbers correctly is important for clear communication in both written and spoken contexts, especially in fields like mathematics, finance, and education.