A number is expressed in standard form if it is written as
where
is any integer, positive, negative or zero. For example,
and
and
are all written in standard form.
We are usually give a number and asked to write it in standard form:
Example: Write 342 in standard form
Example: Write 0.00045 in standard form
Example: Write 3 in standard form
Or given a number in standard form and asked to write it as an ordinary number:
Example: Write
as an ordinary number
A typical question might be: Find the area of the rectangle and write your answer in standard form.
We calculate base*height=
Example: Find the area of the rectangle in standard form
We also have to divide numbers in standard form: