How to square a decimal - ACT Math
Card 0 of 4
What is 
?
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. 
.
You can solve this on your calculator, or think about it as a fraction
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Find the square of 
.
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)
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.
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If 
and 
, what is 
equal to?
If
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 
.
First, we must figure out what
We do
Now to find out what
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
Therefore, we must take
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Evaluate the following:
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.
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.
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