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Examples: Operations on Rational Numbers Video Lecture - Class 7
FAQs on Examples: Operations on Rational Numbers Video Lecture - Class 7
| 1. What are rational numbers? |  |
Ans. Rational numbers are numbers that can be expressed as a fraction, where the numerator and the denominator are both integers. Examples of rational numbers include 1/2, 3/4, and -5/7.
| 2. How do you perform addition and subtraction of rational numbers? | |
Ans. To add or subtract rational numbers, we need to have a common denominator. We find the least common multiple of the denominators and then convert the fractions to have the same denominator. After that, we can simply add or subtract the numerators and keep the denominator unchanged.
| 3. Can you explain how to multiply rational numbers? | |
Ans. To multiply rational numbers, we multiply the numerators together and the denominators together. After that, we simplify the resulting fraction by cancelling out any common factors between the numerator and denominator.
| 4. What is the process for dividing rational numbers? | |
Ans. To divide rational numbers, we multiply the first fraction by the reciprocal of the second fraction. This means we swap the numerator and denominator of the second fraction and then perform the multiplication as described in the previous answer.
| 5. How can rational numbers be represented on a number line? | |
Ans. Rational numbers can be represented on a number line by marking the position of the fraction between the whole numbers. For example, if we have the rational number 1/2, we would mark it halfway between the whole numbers 0 and 1 on the number line.
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