Page 1 - Home Assignment -Introduction-Ch-13 Exponents ane powers

SAI International School

Class-VII

Mathematics

Ch-13-Exponents and Powers

Lesson Note:1

Subtopic-Introduction, Key Terms,

expanding Numbers

Key Vocabulary

 Exponent
 Base
 Product of powers
 Power of a product
 Power of a quotient
 Zero exponent
 Negative exponent

>Powers and Exponents

The power of a number indicates the number of times it must be multiplied.
> It is written in the form a b
> Where ‘b’ indicates the number of times ‘a’ needs to be multiplied to get our result.
>Here ‘a’ is called the base and ‘b’ is called the exponent.
>Example: Consider 9³. Here the exponent ‘3’ indicates that base ‘9’ needs to be multiplied three times to get our
equivalent answer which is 729.

>Powers with Negative Exponents

A negative exponent in power for any non-integer is basically a reciprocal of the power.

Visualizing Powers and Exponents