When two numbers with the same base need to be multiplied together
we can write the equation out like so.
54 x 56 can be written as (5
x 5 x 5 x 5) x (5 x 5 x 5 x5 x 5 x 5)
Notice we have 4 fives in the first bracket and 6 fives in the
second bracket, so altogether we will have 4 + 6 = 10 fives
multiplied together. So we can rewrite the equation as the
following:
54 x 56 = 54+6 = 510
Example
Now let’s go over an example of how to divide two exponents with
the same base.
Let’s divide 45 by 42
So we have 45 / 42 = (4 x 4 x 4 x 4
x4) / (4 x 4)
If we cancel out two top ours with the two bottom fours we
get:
= 43
= 64
So in general to multiply any two powers with the same base by
each other you can add the exponents together and than solve the
equation and similarly when you divide two powers with the same base
together you can subtract the two exponents and than solve. |