-8 是有理数吗？
有理数的形式是 p/q，其中 p 和 q 是整数，q ≠ 0。由于数字的基本结构，p/q 形式，大多数人发现很难区分分数和有理数。
它包括所有整数，可以用分数或小数表示。它用“Q”表示。
示例：-8 、 -5 、-69 等......
-8 是有理数吗？
回答：
A rational number is a sort of real number that has the form p/q where q≠0. When a rational number is split, the result is a decimal number, which can be either a terminating or a recurring decimal.
Here, the given number, -8 can be expressed in the form of p/q, -8/1 and we can write -8 as -8/1 and -8 is also a negative integer .
Hence, -8 is a rational number.
类似问题
问题1：判断-5是否为有理数。
回答：
A rational number is a sort of real number that has the form p/q where q≠0. When a rational number is split, the result is a decimal number, which can be either a terminating or a recurring decimal.
Rational numbers are the numbers that can be expressed as the ratio of two integers. It includes all the integers and can be expressed in terms of fractions or decimals. It is denoted by ‘Q’.
Hence, -5 is an integer and it is a rational number.
问题2：4.82是有理数还是无理数？
回答：
A rational number is a sort of real number that has the form p/q where q≠0. When a rational number is split, the result is a decimal number, which can be either a terminating or a recurring decimal.
Irrational numbers are numbers that cannot be expressed in fractions or ratios of integers. It can be written in decimals and have endless non-repeating digits after the decimal point. It is denoted by ‘P’.
Here, the given number,4.82 can be expressed in the form of p/q.as 4.82 = 482/100 = 241/50 and has terminating digits
Hence,4.82 is a irrational number.
问题 3：判断 5/11 是有理数还是无理数。
回答：
A rational number is a sort of real number that has the form p/q where q≠0. When a rational number is split, the result is a decimal number, which can be either a terminating or a recurring decimal.
Irrational numbers are numbers that cannot be expressed in fractions or ratios of integers. It can be written in decimals and have endless non-repeating digits after the decimal point. It is denoted by ‘P’.
Here, the given number 5/11 can be written as after simplify 0.454545 …. is an rational number as it has recurring digits after decimal
therefore 5/11 is a rational number .
问题4：7.65是有理数吗？
回答：
A rational number is a sort of real number that has the form p/q where q≠0. When a rational number is split, the result is a decimal number, which can be either a terminating or a recurring decimal. Here, the given number, 7.65 has terminating digits.
Hence,7.65…. is a rational number.