Class 8 Exam > Class 8 Videos > Mathematics (Maths) Class 8 > Numerical: Rational Numbers
Numerical: Rational Numbers Video Lecture | Mathematics (Maths) Class 8
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FAQs on Numerical: Rational Numbers Video Lecture - Mathematics (Maths) Class 8
| 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 written in the form p/q, where p and q are integers and q is not equal to zero. Examples of rational numbers include 1/2, -3/4, and 5/1.
| 2. How do rational numbers differ from irrational numbers? | |
Ans. Rational numbers can be expressed as fractions or ratios of integers, whereas irrational numbers cannot be expressed as fractions and their decimal representation goes on forever without repeating. Examples of irrational numbers include √2 and π.
| 3. How can we determine if a number is rational or irrational? | |
Ans. To determine if a number is rational or irrational, we can check its decimal representation. If the decimal terminates or repeats, then the number is rational. If the decimal goes on forever without repeating, it is irrational. Another method is to consider if the number can be expressed as a fraction.
| 4. Can rational numbers be negative? | |
Ans. Yes, rational numbers can be negative. A rational number can have a negative sign in front of it, such as -3/4 or -5/1. The sign indicates the direction or orientation of the number on the number line.
| 5. How are rational numbers used in real-life applications? | |
Ans. Rational numbers have various applications in real life. They are used in measurements, calculations, and comparisons. For example, when measuring ingredients for a recipe, using fractions is common. Rational numbers are also used in financial calculations, such as interest rates and percentages. Real-life examples of rational numbers include prices, distances, and time intervals.
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Dec 22, 2024 Last updated |
Video Description: Numerical: Rational Numbers for Class 8 2024 is part of Mathematics (Maths) Class 8 preparation.
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