All SAT Math Resources
Example Questions
Example Question #1 : How To Divide Fractions
If and , then what is the value of ?
Dividing by a number (in this case ) is equivalent to multiplying by its reciprocal (in this case ). Therefore:
Example Question #1661 : Psat Mathematics
Evaluate the following:
None of the available answers
First we will evaluate the terms in the parentheses:
Next, we will square the first fraction:
We can evaluate the division as such:
Example Question #5 : How To Divide Fractions
Evaluate the expression:
When dividing fractions, you invert the second term and multiply the numbers.
You can reduce the numbers that are diagonal from each other to make the numbers smaller and easier to multiply.
Example Question #1 : How To Divide Fractions
Simplify
Fractions with variables cannot be divided
When you dividing fractions, multiply by the reciprocal of the denominator.
Example Question #152 : Fractions
Which fraction has a value greater than that of X?
First, start by putting changing the fractions in the equation so that they have the same denominator.
Then, you can easily subtract the numerators. The denominator stays the same at this point:
At this point, you can reduce the fraction by dividing the numerator and the denominator by :
Then, to easily compare the fraction to the answer choices, you can change the fraction to a decimal:
By changing the answer choices to decimals as well, you can easily figure out which value is greater than :
, so is the correct answer.
Example Question #34 : New Sat Math Calculator
Jesse has a large movie collection containing X movies. 1/3 of his movies are action movies, 3/5 of the remainder are comedies, and the rest are historical movies. How many historical movies does Jesse own?
(7/12)*X
(11/15)*X
(2/5)*X
(4/15)*X
(3/9)*X
(4/15)*X
1/3 of the movies are action movies. 3/5 of 2/3 of the movies are comedies, or (3/5)*(2/3), or 6/15. Combining the comedies and the action movies (1/3 or 5/15), we get 11/15 of the movies being either action or comedy. Thus, 4/15 of the movies remain and all of them have to be historical.
Example Question #12 : Operations With Fractions
If x = 1/3 and y = 1/2, find the value of 2x + 3y.
5/6
2
6/5
13/6
1
13/6
Substitute the values of x and y into the given expression:
2(1/3) + 3(1/2)
= 2/3 + 3/2
= 4/6 + 9/6
= 13/6
Example Question #131 : Arithmetic
Example Question #151 : Fractions
What is the solution, reduced to its simplest form, for ?
Example Question #152 : Fractions
What is the result of adding of to ?
Let us first get our value for the percentage of the first fraction. 20% of 2/7 is found by multiplying 2/7 by 2/10 (or, simplified, 1/5): (2/7) * (1/5) = (2/35)
Our addition is therefore (2/35) + (1/4). There are no common factors, so the least common denominator will be 35 * 4 or 140. Multiply the numerator and denominator of 2/35 by 4/4 and the numerator of 1/4 by 35/35.
This yields:
(8/140) + (35/140) = 43/140, which cannot be reduced.
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