 # 8th Class Chapter No 12 - Exponents and Powers in Maths for CBSE NCERT

The power of a number indicates the number of times it must be multiplied. It is written in the form ab. 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.A negative exponent in power for any non-integer is basically a reciprocal of the power.
A given rational number can be expressed in expanded form with the help of exponents. Both very large numbers and very small numbers can be represented in the standard form with the help of exponents.
We need to move the decimal place towards the left,if it is a very large number like 150,000,000,000, And when we do so the exponent will be positive.
We need to move the decimal places to the right in-order to represent the number in its standard form,if it is a very small number like 0.000007, When being shifted to the right, the exponent will be negative.
Posted in 8th on June 05 2020 at 03:08 PM

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