<< Chapter < Page Chapter >> Page >

The English words quotient and ratio are often used to describe fractions. Remember that “quotient” means division . The quotient of a and b is the result we get from dividing a by b , or a b .

Translate the English 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 n , 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 English phrase into an algebraic expression: the quotient of the difference of a and b , and cd .

a b c d

Got questions? Get instant answers now!

Translate the English 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!

Key concepts

  • Equivalent Fractions Property: If a , b , c are numbers where b 0 , c 0 , then
    a b = a · c b · c and a · c b · c = a b .
  • Fraction Division: If a , b , c and d are numbers where b 0 , c 0 , and d 0 , then a b ÷ c d = a b · d c . To divide fractions, multiply the first fraction by the reciprocal of the second.
  • Fraction Multiplication: If a , b , c and d are numbers where b 0 , and d 0 , then a b · c d = a c b d . To multiply fractions, multiply the numerators and multiply the denominators.
  • Placement of Negative Sign in a Fraction: For any positive numbers a and b , a b = a b = a b .
  • Property of One: a a = 1 ; Any number, except zero, divided by itself is one.
  • Simplify a Fraction
    1. Rewrite the numerator and denominator to show the common factors. If needed, factor the numerator and denominator into prime numbers first.
    2. Simplify using the equivalent fractions property by dividing out common factors.
    3. Multiply any remaining factors.
  • Simplify an Expression with a Fraction Bar
    1. Simplify the expression in the numerator. Simplify the expression in the denominator.
    2. Simplify the fraction.

Practice makes perfect

Find Equivalent Fractions

In the following exercises, find three fractions equivalent to the given fraction. Show your work, using figures or algebra.

3 8

6 16 , 9 24 , 12 32 answers may vary

Got questions? Get instant answers now!

5 9

10 18 , 15 27 , 20 36 answers may vary

Got questions? Get instant answers now!

Simplify Fractions

In the following exercises, simplify.

Multiply Fractions

In the following exercises, multiply.

( 14 15 ) ( 9 20 )

21 50

Got questions? Get instant answers now!

( 63 84 ) ( 44 90 )

11 30

Got questions? Get instant answers now!

( 63 60 ) ( 40 88 )

Got questions? Get instant answers now!

Divide Fractions

In the following exercises, divide.

7 9 ÷ ( 7 4 )

1

Got questions? Get instant answers now!

5 18 ÷ ( 15 24 )

4 9

Got questions? Get instant answers now!

8 u 15 ÷ 12 v 25

10 u 9 v

Got questions? Get instant answers now!

3 4 ÷ ( −12 )

1 16

Got questions? Get instant answers now!

In the following exercises, simplify.

Simplify Expressions Written with a Fraction Bar

In the following exercises, simplify.

8 · 3 + 2 · 9 14 + 3

2 8 17

Got questions? Get instant answers now!

9 · 6 4 · 7 22 + 3

Got questions? Get instant answers now!

5 · 6 3 · 4 4 · 5 2 · 3

3 5

Got questions? Get instant answers now!

8 · 9 7 · 6 5 · 6 9 · 2

Got questions? Get instant answers now!

7 · 4 2 ( 8 5 ) 9 · 3 3 · 5

11 6

Got questions? Get instant answers now!

9 · 7 3 ( 12 8 ) 8 · 7 6 · 6

Got questions? Get instant answers now!

9 ( 8 2 ) 3 ( 15 7 ) 6 ( 7 1 ) 3 ( 17 9 )

5 2

Got questions? Get instant answers now!

8 ( 9 2 ) 4 ( 14 9 ) 7 ( 8 3 ) 3 ( 16 9 )

Got questions? Get instant answers now!

Translate Phrases to Expressions with Fractions

In the following exercises, translate each English phrase into an algebraic expression.

the quotient of r and the sum of s and 10

r s + 10

Got questions? Get instant answers now!

the quotient of A and the difference of 3 and B

Got questions? Get instant answers now!

the quotient of the difference of x and y , and 3

x y −8

Got questions? Get instant answers now!

the quotient of the sum of m and n , and 4 q

Got questions? Get instant answers now!

Everyday math

Baking. A recipe for chocolate chip cookies calls for 3 4 cup brown sugar. Imelda wants to double the recipe. How much brown sugar will Imelda need? Show your calculation. Measuring cups usually come in sets of 1 4 , 1 3 , 1 2 , and 1 cup. Draw a diagram to show two different ways that Imelda could measure the brown sugar needed to double the cookie recipe.

1 1 2 cups answers will vary

Got questions? Get instant answers now!

Baking. Nina is making 4 pans of fudge to serve after a music recital. For each pan, she needs 2 3 cup of condensed milk. How much condensed milk will Nina need? Show your calculation. Measuring cups usually come in sets of 1 4 , 1 3 , 1 2 , and 1 cup. Draw a diagram to show two different ways that Nina could measure the condensed milk needed for 4 pans of fudge.

Got questions? Get instant answers now!

Portions Don purchased a bulk package of candy that weighs 5 pounds. He wants to sell the candy in little bags that hold 1 4 pound. How many little bags of candy can he fill from the bulk package?

20 bags

Got questions? Get instant answers now!

Portions Kristen has 3 4 yards of ribbon that she wants to cut into 6 equal parts to make hair ribbons for her daughter’s 6 dolls. How long will each doll’s hair ribbon be?

Got questions? Get instant answers now!

Writing exercises

Rafael wanted to order half a medium pizza at a restaurant. The waiter told him that a medium pizza could be cut into 6 or 8 slices. Would he prefer 3 out of 6 slices or 4 out of 8 slices? Rafael replied that since he wasn’t very hungry, he would prefer 3 out of 6 slices. Explain what is wrong with Rafael’s reasoning.

Answers may vary

Got questions? Get instant answers now!

Give an example from everyday life that demonstrates how 1 2 · 2 3 is 1 3 .

Got questions? Get instant answers now!

Explain how you find the reciprocal of a fraction.

Answers may vary

Got questions? Get instant answers now!

Explain how you find the reciprocal of a negative number.

Got questions? Get instant answers now!

Self check

After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section.

A table is shown that is made up of four columns and seven rows. The first row reads “I can…” in the first column, “Confidently” in the second column, “With some help” in the third column and “No – I don’t get it” in the last column. The next row down in the first column reads “find equivalent fractions”, under this reads “simplify fractions”, under this reads “multiply fractions”, under this reads “divide fractions”, under this reads “Simplify expressions written with a fraction bar” and under this reads “translate phrases to expressions with fractions.”

After looking at the checklist, do you think you are well prepared for the next section? Why or why not?

Questions & Answers

what is phylogeny
Odigie Reply
evolutionary history and relationship of an organism or group of organisms
AI-Robot
ok
Deng
what is biology
Hajah Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
what is biology
Victoria Reply
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply
Practice Key Terms 7

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Elementary algebra. OpenStax CNX. Jan 18, 2017 Download for free at http://cnx.org/content/col12116/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

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

Ask