# CBSE Class 7 Maths Revision Notes Chapter 13

## CBSE Class 7 Mathematics Chapter 13 Revision Notes – Exponents and Powers

To make it easy for the students to revise the chapter “Exponents and Power”, the Class 7 Mathematics Chapter 13 Revision Notes have been specially crafted by the subject experts at Extramarks. It is to be noted that the Class 7 Mathematics Chapter 13 Revision Notes substantiate the NCERT books. Thus, the notes act as a consolidating supplement to the core syllabus.

The use of clear and simple language, along with relevant examples, will make it easy for the students to get better conceptual clarity. To strengthen the basics, it is thus necessary to regularly revise the Class 7 Mathematics Chapter 13 Revision Notes. If required, the candidates can also access the other revision notes by Extramarks along with the Class 7 Mathematics Chapter 13 Revision Notes.

### Revision Notes for Class 7 Mathematics Chapter 13

Several important topics of Class 7 Mathematics Chapter 13 are covered in these notes. They include topics relating to powers and exponents and understanding the power of visualising exponents. Students are advised to read these notes to have conceptual clarity of all the major topics of this chapter.

### Access Class 7 Mathematics Chapter 13 Revision Notes – Exponents and Powers

Exponents

Exponents aid in conveying big numbers in a more understandable, comparable, readable and manipulable format.

Large Numbers

It is difficult to manipulate, compare, comprehend and read large numbers.

### 1. Which are the important topics in Class 7 Mathematics Chapter 13?

The candidate should focus on the following topics in the chapter.

• Powers and exponents
• Power of visualising exponents
• Standard form

### 2. Do NCERT notes available on the Extramarks website cover all the concepts?

Yes, all the concepts of Class 7 Mathematics Chapter 13 are covered in the notes along with the important questions that can be practised for scoring well in the final examination.

### 3. How to access the notes on the Extramarks website?

Candidates can access the revision notes by Extramarks for Class 7 Mathematics Chapter 13 on the website.

### 4. What are the exponents?

Powers are used to express large numbers as exponents.

### 5. What are the different exponential laws?

There are two exponential laws. These are described as follows.

•  Multiplication Law: Bases – multiple like ones; adding exponents while keeping the base constant. When one base is increased with power to another, multiply the exponents while keeping the base constant.
• Division Law: Bases – dividing like ones; remove the denominator’s exponent from the numerator’s exponent and maintain the base constantly.