Mathematics: Number System: Positive and Negative Rational Numbers (For CBSE, ICSE, IAS, NET, NRA 2022)

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Consider the situation, when an integer is divided by another non-zero integer . the following cases arise:

When Number is Divided by Another Number
  • When is a multiple of .
  • Suppose where is a natural number or integer, then
  • When is not a multiple of .
  • In this case is not an integer, and hence is a new type of number. Such a number is called a rational number.

There are two types of Rational Numbers:

Types of Rational Numbers

Positive and Negative Rational Numbers

A rational number is said to be a positive rational number if p and q are both positive and both negative integers.

For example: (all are positive rationales)

If the integers p and q are of different signs, then is said to be a negative rational number.

For example: (all are negative rationals)

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