# NCERT Solutions for Class 7 Maths Chapter 13: Exponents and Power

Power is an expression that shows repeated multiplication of the same factor, and exponent means the number of times a number is multiplied by itself. Exponents are used to writing the long numbers as short notations to make these numbers easy to understand, read and compare. There are many laws of exponents. In Ex 13.1, there is the introduction of this chapter. This part is very easy as it has simple problems.

This topic helps students to have a better understanding of concepts. In Ex 13.2 students will learn about laws of exponents that are multiplication and division of power with the same base, taking the power of a power, multiplying and dividing the powers with exponents, numbers with exponent zero with multiple examples. In Ex 13.3, you will learn about the decimal number system's topics and express a large number in standard forms. The main topics and subtopics covered in this chapter are:

• Exponents
• Laws of Exponent
• Multiplying powers with the same base
• Dividing powers with the same base
• Taking the power of a power
• Multiplying powers with the same base
• Examples using laws of exponents
• Decimal number system
• Expressing large numbers in standard form