## Exam - Focused Revision Notes for CBSE Class 7 Maths Chapter 2 - Fractions and Decimals

## FAQs on Fractions and Decimals Class 7 Notes CBSE Maths Chapter 2 (Free PDF Download)

1. What are some of the uses of fractions and decimals?

Fractions and decimals are used in many different ways in mathematics and everyday life. Here are a few examples:

Fractions are used to represent parts of a whole. For example, you can use fractions to represent the number of slices of pizza you have eaten.

Decimals are used to represent numbers that are not whole numbers. For example, you can use decimals to represent the temperature in degrees Celsius.

Fractions and decimals are used in many different formulas in mathematics. For example, you can use fractions to represent the slope of a line or the area of a triangle.

Fractions and decimals are used in everyday life to represent quantities such as money, weight, and volume. For example, you can use fractions to represent the amount of change you have received or the amount of liquid in a container.

2. How do we add and subtract fractions?

To add or subtract fractions, we first need to make sure that the fractions have the same denominator. Once the fractions have the same denominator, we can simply add or subtract the numerators. For example, to add 1/2 and 1/4, we would first need to make sure that both fractions have the same denominator. We can do this by multiplying 1/2 by 2/2, which gives us 2/4. Now that both fractions have the same denominator, we can simply add the numerators: 2/4 + 1/4 = 3/4.

To subtract fractions, we would follow the same procedure as adding fractions, but instead of adding the numerators, we would subtract them.

3. How do we multiply and divide fractions?

To multiply fractions, we simply multiply the numerators and the denominators. For example, to multiply 1/2 by 3/4, we would multiply the numerators 1 and 3, and the denominators 2 and 4. This gives us 3/8.

To divide fractions, we flip the second fraction and multiply. For example, to divide 1/2 by 3/4, we would flip the second fraction, 3/4, to get 4/3, and then multiply 1/2 by 4/3. This gives us 4/6, which can be simplified to 2/3.

4. What are repeating decimals?

Repeating decimals are non-terminating decimals where a certain group of digits repeats itself over and over again. For example, 0.33333333... is a repeating decimal where the group of digits 333 repeats itself.

Repeating decimals can be converted to fractions by using a process called "decimals to fractions".

Here are the steps to convert repeating decimals to fractions:

Write the repeating decimal as a fraction with a denominator of 10.

Multiply the numerator and denominator of the fraction by the number that is formed by repeating the group of digits after the decimal point.

Simplify the fraction.

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