Jisho

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正の数と負の数
Wikipedia definition
1. Negative number​A negative number is a real number that is less than zero. Such numbers are often used to represent the amount of a loss or absence. For example, a debt that is owed may be thought of as a negative asset, or a decrease in some quantity may be thought of as a negative increase. Negative numbers are used to describe values on a scale that goes below zero, such as the Celsius and Fahrenheit scales for temperature. Negative numbers are usually written with a minus sign in front.
Read “Negative number” on English Wikipedia
Read “正の数と負の数” on Japanese Wikipedia
Read “Negative number” on DBpedia

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