All ACT Math Resources
Example Question #1 : How To Square A Decimal
Find the square of .
Squaring a decimal is identical to multiplying decimals.
Drop the decimal, multiply the number by its self, and then add up the decimal points in the original problem and put it back into your answer.
(note: 4 decimal places)
Example Question #2 : How To Square A Decimal
What is ?
You can solve this on your calculator, or think about it as a fraction to make the problem easier to do by hand. .
Example Question #3 : How To Square A Decimal
If and , what is equal to?
First, we must figure out what is equal to.
We do .
Now to find out what is equal to, we look at .
We move our decimal points over so that we are dealing with only whole numbers. This gives us .
Finally, we count how many spaces we moved our decimals in total, and we move the decimal in our answer back that many spaces. To get from to we moved our decimal two spaces to the right. Because we did this for each of the values, our total spaces we moved the decimal was to the right.
Therefore, we must take and move the decimal places to the left. This gives us .
Example Question #4 : Basic Squaring / Square Roots
Evaluate the following:
To solve, simply multiply 0.02 by 0.02 as though the numbers are without decimals.
Then, sum the number of spaces to the right of the decimal points in your problem and include that many in your answer.
Thus, your answer is .0004.