|
The multiplication sign or times sign is the symbol ×. The symbol is similar to the lowercase letter x but is a more symmetric saltire, and has different uses. It is also known as St. Andrew's Cross and dimension sign. ==Uses== In mathematics, the symbol × (read as ''times'' or ''multiplied by'') is primarily used to denote the * Multiplication of two numbers * Cross product of two vectors * Cartesian product of two sets * Geometric dimension of an object, such as noting that a room is 10 feet × 12 feet in area, where it is usually read as "by" (for example: "10 feet by 12 feet") * Dimensions of a matrix In biology, the multiplication sign is used in a botanical hybrid name, where it is read as "cross". The multiplication sign is also used by historians for an event between two dates. When employed between two dates, for example 1225 and 1232, 1225×1232 means "no earlier than 1225 and no later than 1232". It can also be used in a date range: 1225×1232–1278. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Multiplication sign」の詳細全文を読む スポンサード リンク
|