Chapter 3 Number Systems and Boolean Algebra 3.1.2 Positional notation The position to the left of the units position is always the number base raised to the first power, in a decimal system, this is 101, or 10. In a binary system, it is 21, or 2; and in an octal system it is 81, or 8. Therefore, an 1l decimal has a different value from an 11 binary. The ll decimal is composed of I ten plus I unit and has a value of ll units; while the binary number ll is composed of I two plus 1 unit, for a value of 3 decimal units. The 1l octal has a value of g units 个位左边的位总是基数的1次幂,在十进制系统中是101,或 10;在二进制中是21,或2;而在八进制中是81,或8。因此 十进制的11与二进制的11具有不同的数值。十进制11表示一 个10加上一个1,其值为11;二进制1表示个2加上一个1, 其值为3;八进制1的值为9 计算机专业英语 3-10Chapter 3 Number Systems and Boolean Algebra 计算机专业英语 3-10 The position to the left of the units position is always the number base raised to the first power; in a decimal system, this is l01, or l0. In a binary system, it is 21, or 2; and in an octal system it is 81, or 8. Therefore, an 11 decimal has a different value from an 11 binary. The 1l decimal is composed of 1 ten plus 1 unit and has a value of 11 units; while the binary number 11 is composed of 1 two plus 1 unit, for a value of 3 decimal units. The 11 octal has a value of 9 units. 3.1.2 Positional Notation 个位左边的位总是基数的1次幂，在十进制系统中是101，或 10；在二进制中是21，或2；而在八进制中是81，或8。因此， 十进制的11与二进制的11具有不同的数值。十进制11表示— 个10加上一个1，其值为11；二进制11表示—个2加上—个1， 其值为3；八进制11的值为9