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Fractions Video Lecture - Class 5
FAQs on Fractions Video Lecture - Class 5
| 1. What are fractions? |  |
Ans. Fractions are numbers that represent a part of a whole. They consist of a numerator (the top number) and a denominator (the bottom number) separated by a fraction line. For example, in the fraction 3/4, 3 is the numerator and 4 is the denominator. It represents that we have 3 parts out of 4 equal parts.
| 2. How do you add fractions? | |
Ans. To add fractions, we need to have a common denominator. If the denominators are already the same, we can simply add the numerators. For example, to add 1/4 and 3/4, we add the numerators (1 + 3 = 4) and keep the denominator the same (4). So, the sum is 4/4.
If the denominators are different, we need to find a common denominator. We can do this by finding the least common multiple (LCM) of the denominators. Once we have a common denominator, we can add the fractions by adding the numerators and keeping the denominator the same.
| 3. How do you subtract fractions? | |
Ans. To subtract fractions, we also need a common denominator. If the denominators are the same, we can simply subtract the numerators. For example, to subtract 2/5 from 3/5, we subtract the numerators (3 - 2 = 1) and keep the denominator the same (5). So, the difference is 1/5.
If the denominators are different, we follow the same steps as in adding fractions. Find a common denominator, subtract the numerators, and keep the denominator the same.
| 4. How do you multiply fractions? | |
Ans. To multiply fractions, we simply multiply the numerators and multiply the denominators. For example, to multiply 2/3 and 4/5, we multiply the numerators (2 * 4 = 8) and multiply the denominators (3 * 5 = 15). So, the product is 8/15.
If there are whole numbers involved, we can convert them to fractions by putting them over 1 and then multiply.
| 5. How do you divide fractions? | |
Ans. To divide fractions, we need to multiply the first fraction by the reciprocal of the second fraction. The reciprocal of a fraction is obtained by flipping the numerator and denominator. For example, to divide 2/3 by 4/5, we multiply 2/3 by 5/4 (reciprocal of 4/5). This gives us (2/3) * (5/4) = 10/12. We can simplify this fraction by dividing both the numerator and denominator by their greatest common divisor, which in this case is 2. So, the simplified result is 5/6.
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