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CBSE Maths  Class 8 Exponents and Power We will proceed to discuss the Exponents and Power from  Class 8 Maths . An Exponent stands for a way repeatedly the amount is increased.We have studied in previous Class‘how to put in writing massive numbers mistreatment exponents’. It involves 2 numbers a and b wherever a is base and b is that the exponent. Mass of earth is 5,970,000,000,000,000,000,000,000 kg, which can be written as 5, 97 x 10  24  . 10  24  can be read as 10 raised to the power 24. Now, we will find what is 2 -2   is equal to? Powers with negative exponents We know that 10  2   = 10 x 10=100 As the exponents decrease by 1 the value becomes one tenth of the previous value. 10  1  =100/10=10 10  0  =10/10=1 10  -1  =1/10 10  2  =1/100 So, by observing the above pattern we can say that any integer  a  which is non -zero, a   -m  =1/ a   m  , where  m  is a positive integer. a   -m  Is the multiplicative inverse of a   m  . Laws of exponents