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What are Rational Numbers? Video Lecture | Mathematics (Maths) Class 9
FAQs on What are Rational Numbers? Video Lecture - Mathematics (Maths) Class 9
| 1. What are rational numbers? |  |
Ans. Rational numbers are numbers that can be expressed as a fraction or a ratio of two integers. They can be positive or negative and include whole numbers, integers, and fractions.
| 2. How do you identify if a number is rational? | |
Ans. To identify if a number is rational, you need to check if it can be expressed as a fraction. If a number can be written as a ratio of two integers, it is rational. For example, 3/4, -5/2, and 2 are all rational numbers.
| 3. Are all integers rational numbers? | |
Ans. Yes, all integers are rational numbers. Since integers can be expressed as a fraction with a denominator of 1, they meet the criteria of being rational numbers. For example, 5 can be written as 5/1, making it a rational number.
| 4. Are irrational numbers considered rational? | |
Ans. No, irrational numbers are not considered rational. Irrational numbers are numbers that cannot be expressed as a fraction or ratio of two integers. Examples of irrational numbers include π (pi) and √2 (square root of 2).
| 5. Can rational numbers be negative? | |
Ans. Yes, rational numbers can be negative. Rational numbers include both positive and negative numbers that can be expressed as a fraction. For example, -3/5, -2, and -7/2 are all examples of negative rational numbers.
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