<< Chapter < Page Chapter >> Page >

Translate the phrase into an algebraic expression: “the quotient of 3 x and 8 .”

Solution

The keyword is quotient ; it tells us that the operation is division. Look for the words of and and to find the numbers to divide.

The quotient of 3 x and 8 .

This tells us that we need to divide 3 x by 8 . 3 x 8

Got questions? Get instant answers now!
Got questions? Get instant answers now!

Translate the phrase into an algebraic expression: the quotient of 9 s and 14 .

9 s 14

Got questions? Get instant answers now!

Translate the phrase into an algebraic expression: the quotient of 5 y and 6 .

5 y 6

Got questions? Get instant answers now!

Translate the phrase into an algebraic expression: the quotient of the difference of m and n , and p .

Solution

We are looking for the quotient of the difference of m and , and p . This means we want to divide the difference of m and n by p .

m n p
Got questions? Get instant answers now!
Got questions? Get instant answers now!

Translate the phrase into an algebraic expression: the quotient of the difference of a and b , and c d .

a b c d

Got questions? Get instant answers now!

Translate the phrase into an algebraic expression: the quotient of the sum of p and q , and r .

p + q r

Got questions? Get instant answers now!

Simplify complex fractions

Our work with fractions so far has included proper fractions, improper fractions, and mixed numbers. Another kind of fraction is called complex fraction    , which is a fraction in which the numerator or the denominator contains a fraction.

Some examples of complex fractions are:

6 7 3 3 4 5 8 x 2 5 6

To simplify a complex fraction, remember that the fraction bar means division. So the complex fraction 3 4 5 8 can be written as 3 4 ÷ 5 8 .

Simplify: 3 4 5 8 .

Solution

3 4 5 8
Rewrite as division. 3 4 ÷ 5 8
Multiply the first fraction by the reciprocal of the second. 3 4 · 8 5
Multiply. 3 · 8 4 · 5
Look for common factors. 3 · · 2 · 5
Remove common factors and simplify. 6 5
Got questions? Get instant answers now!
Got questions? Get instant answers now!

Simplify: 3 7 6 11 .

11 14

Got questions? Get instant answers now!

Simplify a complex fraction.

  1. Rewrite the complex fraction as a division problem.
  2. Follow the rules for dividing fractions.
  3. Simplify if possible.

Simplify: 6 7 3 .

Solution

6 7 3
Rewrite as division. 6 7 ÷ 3
Multiply the first fraction by the reciprocal of the second. 6 7 · 1 3
Multiply; the product will be negative. 6 · 1 7 · 3
Look for common factors. · 2 · 1 7 ·
Remove common factors and simplify. 2 7
Got questions? Get instant answers now!
Got questions? Get instant answers now!

Simplify: 8 7 4 .

2 7

Got questions? Get instant answers now!

Simplify: 3 9 10 .

10 3

Got questions? Get instant answers now!

Simplify: x 2 x y 6 .

Solution

x 2 x y 6
Rewrite as division. x 2 ÷ x y 6
Multiply the first fraction by the reciprocal of the second. x 2 · 6 x y
Multiply. x · 6 2 · x y
Look for common factors. · 3 · · · y
Remove common factors and simplify. 3 y
Got questions? Get instant answers now!
Got questions? Get instant answers now!

Simplify: a 8 a b 6 .

3 4 b

Got questions? Get instant answers now!

Simplify: p 2 p q 8 .

4 q

Got questions? Get instant answers now!

Simplify: 2 3 4 1 8 .

Solution

2 3 4 1 8
Rewrite as division. 2 3 4 ÷ 1 8
Change the mixed number to an improper fraction. 11 4 ÷ 1 8
Multiply the first fraction by the reciprocal of the second. 11 4 · 8 1
Multiply. 11 · 8 4 · 1
Look for common factors. 11 · · 2 · 1
Remove common factors and simplify. 22
Got questions? Get instant answers now!
Got questions? Get instant answers now!

Simplify: 5 7 1 2 5 .

25 49 .

Got questions? Get instant answers now!

Simplify: 8 5 3 1 5 .

1 2

Got questions? Get instant answers now!

Simplify expressions with a fraction bar

Where does the negative sign go in a fraction? Usually, the negative sign is placed in front of the fraction, but you will sometimes see a fraction with a negative numerator or denominator. Remember that fractions represent division. The fraction 1 3 could be the result of dividing −1 3 , a negative by a positive, or of dividing 1 −3 , a positive by a negative. When the numerator and denominator have different signs, the quotient is negative.

Negative 1 over positive 3 is equal to negative one third. Negative over positive equals negative. Positive 1 over negative 3 is equal to negative one third. Positive over negative equals negative.

If both the numerator and denominator are negative, then the fraction itself is positive because we are dividing a negative by a negative.

Practice Key Terms 1

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Prealgebra. OpenStax CNX. Jul 15, 2016 Download for free at http://legacy.cnx.org/content/col11756/1.9
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Prealgebra' conversation and receive update notifications?

Ask