Why do we pronounce 115 one fifteen?

The pronunciation of numbers in English often follows specific patterns that can seem inconsistent at first. The number 115 is pronounced "one fifteen" primarily because of the way we break down and group numbers. When we read whole numbers, we tend to use the "tens" place value when it’s a two-digit number. In this case, "fifteen" corresponds to the digits "10" and "5". Thus, 115 is pronounced as "one" (the hundreds place) followed by "fifteen" (the tens and units combined). This same system applies to other numbers in a similar format: - 120 is pronounced "one hundred twenty" - 135 is pronounced "one hundred thirty-five" In short, the pronunciation reflects a mixture of grouping conventions and comfortable linguistic patterns, contributing to clarity and ease of communication.