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What are Rational Numbers? Video Lecture | Mathematics (Maths) Class 8

79 videos|408 docs|31 tests

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00:03 Number Line & Integers
00:18 Rational Numbers
00:39 Conditions of the Rational Numbers
01:22 Definition of Rational Numbers

FAQs on What are Rational Numbers? Video Lecture - Mathematics (Maths) Class 8

1. What are Rational Numbers?
Ans. Rational numbers are numbers that can be expressed in the form of p/q, where p and q are integers and q is not equal to zero.
2. How are Rational Numbers different from Irrational Numbers?
Ans. Rational numbers can be expressed as a ratio of two integers, while irrational numbers cannot be expressed in such a way. Irrational numbers are non-repeating and non-terminating decimal numbers.
3. What are some examples of Rational Numbers?
Ans. Examples of Rational Numbers include 2/3, -4/5, 1, 0, 7/1, among others.
4. How do you add and subtract Rational Numbers?
Ans. To add and subtract Rational Numbers, we first find the least common multiple of the denominators. Then, we convert the fractions to equivalent fractions with the same denominator and add or subtract the numerators accordingly.
5. Can every decimal be expressed as a Rational Number?
Ans. No, not every decimal can be expressed as a Rational Number. Decimals that are repeating or terminating can be expressed as Rational Numbers, but non-repeating and non-terminating decimals are irrational numbers and cannot be expressed as a ratio of two integers.
79 videos|408 docs|31 tests
Video Timeline
Video Timeline
arrow
00:03 Number Line & Integers
00:18 Rational Numbers
00:39 Conditions of the Rational Numbers
01:22 Definition of Rational Numbers
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