Chapter 3 Number Systems and Boolean Algebra 3.1.1 Digits If the base of a number exceeds 10. the additional digits use the letters of the alphabet, beginning with an A, For example, a base 12 number contains 12 digits: 0 through 9, followed by A for 10 and B for 11, Note that a base 10 number does not contain a 10 digit, just as a base 8 number does net contain an 8 digit. The most common numbering systems used with computers are decimal, binary, and hexadecimal(base 16). Many years ago octal numbers were popular. Each system is described and used in this section of the chapter. 如果基数大于10,其余数字用从A开始的字母表示,例如,以12为基的数包含12个数 字,0到9,之后用A代表10,B代表11。注意,以10为基的数不包含数字10,如同以8 为基的数不包括数字8一样。计算机中最通用的计数制是十进制、二进制、八进制和 十六进制(基为16)。每种计数制都将在本节中进行说明和应用。 《什第机专出美语Chapter 3 Number Systems and Boolean Algebra 计算机专业英语 3-7 If the base of a number exceeds 10, the additional digits use the letters of the alphabet, beginning with an A, For example, a base 12 number contains 12 digits: 0 through 9, followed by A for 10 and B for 11, Note that a base 10 number does not contain a 10 digit, just as a base 8 number does net contain an 8 digit. The most common numbering systems used with computers are decimal, binary, and hexadecimal (base 16). (Many years ago octal numbers were popular.) Each system is described and used in this section of the chapter. 3.1.1 Digits 如果基数大于10，其余数字用从A开始的字母表示，例如，以12为基的数包含12个数 字，0到9，之后用A代表10，B代表11。注意，以10为基的数不包含数字10，如同以8 为基的数不包括数字8一样。计算机中最通用的计数制是十进制、二进制、八进制和 十六进制(基为16)。每种计数制都将在本节中进行说明和应用