PPT: Exponents and Power | Mathematics (Maths) Class 8 PDF Download

 Page 2


a²
exponent
base number
The exponent of a number tells us how many times a
base number is multiplied by itself.
What is an exponent
This tells us that a is multiplied
by itself two times.
So, a² means a x a
Page 3


a²
exponent
base number
The exponent of a number tells us how many times a
base number is multiplied by itself.
What is an exponent
This tells us that a is multiplied
by itself two times.
So, a² means a x a
a ?¹
exponent
base number
The exponents could be negative also and we can
convert them in positive by the following method.
Negative Exponent
take the number in the
denominator and make the
power positive
So, a ?¹ means 1/a
Page 4


a²
exponent
base number
The exponent of a number tells us how many times a
base number is multiplied by itself.
What is an exponent
This tells us that a is multiplied
by itself two times.
So, a² means a x a
a ?¹
exponent
base number
The exponents could be negative also and we can
convert them in positive by the following method.
Negative Exponent
take the number in the
denominator and make the
power positive
So, a ?¹ means 1/a
Law of exponents
Page 5


a²
exponent
base number
The exponent of a number tells us how many times a
base number is multiplied by itself.
What is an exponent
This tells us that a is multiplied
by itself two times.
So, a² means a x a
a ?¹
exponent
base number
The exponents could be negative also and we can
convert them in positive by the following method.
Negative Exponent
take the number in the
denominator and make the
power positive
So, a ?¹ means 1/a
Law of exponents
QUESTION 1
Evaluate the expression y4 if y = 6.
y4 = y x y x y x y 
Substitute 6 into y. 
64 = 6 x 6 x 6 x 6 
64 = 1296