<< Chapter < Page Chapter >> Page >

Practice makes perfect

Add and Subtract Decimals

In the following exercises, add or subtract.

16.53 24.38

−40.91

Got questions? Get instant answers now!

38.69 + 31.47

−7.22

Got questions? Get instant answers now!

4.2 + ( 9.3 )

−13.5

Got questions? Get instant answers now!

91.75 ( 10.462 )

102.212

Got questions? Get instant answers now!

94.69 ( 12.678 )

Got questions? Get instant answers now!

Multiply Decimals

In the following exercises, multiply.

( 8.52 ) ( 3.14 )

26.7528

Got questions? Get instant answers now!

(−4.3)(2.71)

−11.653

Got questions? Get instant answers now!

(−5.18)(−65.23)

337.8914

Got questions? Get instant answers now!

( 9.16 ) ( 68.34 )

Got questions? Get instant answers now!

( 0.09 ) ( 24.78 )

2.2302

Got questions? Get instant answers now!

( 0.06 ) ( 21.75 )

1.305

Got questions? Get instant answers now!

( 55.2 ) ( 1,000 )

55,200

Got questions? Get instant answers now!

Divide Decimals

In the following exercises, divide.

1.44 ÷ ( 0.3 )

−4.8

Got questions? Get instant answers now!

1.75 ÷ ( 0.05 )

35

Got questions? Get instant answers now!

1.15 ÷ ( 0.05 )

Got questions? Get instant answers now!

Mixed Practice

In the following exercises, simplify.

24 ( 0.5 ) + ( 0.3 ) 2

12.09

Got questions? Get instant answers now!

1.15 ( 26.83 + 1.61 )

32.706

Got questions? Get instant answers now!

$45 + 0.08 ( $45 )

$48.60

Got questions? Get instant answers now!

18 ÷ ( 0.75 + 0.15 )

20

Got questions? Get instant answers now!

( 1.43 + 0.27 ) ÷ ( 0.9 0.05 )

2

Got questions? Get instant answers now!

( 1.5 0.06 ) ÷ ( 0.12 + 0.24 )

Got questions? Get instant answers now!

[ $75.42 + 0.18 ( $75.42 ) ] ÷ 5

$17.80

Got questions? Get instant answers now!

[ $56.31 + 0.22 ( $56.31 ) ] ÷ 4

Got questions? Get instant answers now!

Use Decimals in Money Applications

In the following exercises, use the strategy for applications to solve.

Spending money Brenda got $40 from the ATM. She spent $15.11 on a pair of earrings. How much money did she have left?

$24.89

Got questions? Get instant answers now!

Spending money Marissa found $20 in her pocket. She spent $4.82 on a smoothie. How much of the $20 did she have left?

Got questions? Get instant answers now!

Shopping Adam bought a t-shirt for $18.49 and a book for $8.92 The sales tax was $1.65 . How much did Adam spend?

$29.06

Got questions? Get instant answers now!

Restaurant Roberto’s restaurant bill was $20.45 for the entrée and $3.15 for the drink. He left a $4.40 tip. How much did Roberto spend?

Got questions? Get instant answers now!

Coupon Emily bought a box of cereal that cost $4.29 . She had a coupon for $0.55 off, and the store doubled the coupon. How much did she pay for the box of cereal?

$3.19

Got questions? Get instant answers now!

Coupon Diana bought a can of coffee that cost $7.99 . She had a coupon for $0.75 off, and the store doubled the coupon. How much did she pay for the can of coffee?

Got questions? Get instant answers now!

Diet Leo took part in a diet program. He weighed 190 pounds at the start of the program. During the first week, he lost 4.3 pounds. During the second week, he had lost 2.8 pounds. The third week, he gained 0.7 pounds. The fourth week, he lost 1.9 pounds. What did Leo weigh at the end of the fourth week?

181.7 pounds

Got questions? Get instant answers now!

Snowpack On April 1 , the snowpack at the ski resort was 4 meters deep, but the next few days were very warm. By April 5 , the snow depth was 1.6 meters less. On April 8 , it snowed and added 2.1 meters of snow. What was the total depth of the snow?

Got questions? Get instant answers now!

Coffee Noriko bought 4 coffees for herself and her co-workers. Each coffee was $3.75 . How much did she pay for all the coffees?

$15.00

Got questions? Get instant answers now!

Subway Fare Arianna spends $4.50 per day on subway fare. Last week she rode the subway 6 days. How much did she spend for the subway fares?

Got questions? Get instant answers now!

Income Mayra earns $9.25 per hour. Last week she worked 32 hours. How much did she earn?

$296.00

Got questions? Get instant answers now!

Income Peter earns $8.75 per hour. Last week he worked 19 hours. How much did he earn?

Got questions? Get instant answers now!

Hourly Wage Alan got his first paycheck from his new job. He worked 30 hours and earned $382.50 . How much does he earn per hour?

$12.75

Got questions? Get instant answers now!

Hourly Wage Maria got her first paycheck from her new job. She worked 25 hours and earned $362.50 . How much does she earn per hour?

Got questions? Get instant answers now!

Restaurant Jeannette and her friends love to order mud pie at their favorite restaurant. They always share just one piece of pie among themselves. With tax and tip, the total cost is $6.00 . How much does each girl pay if the total number sharing the mud pie is

2 ?

3 ?

4 ?

5 ?

6 ?

  1. $3
  2. $2
  3. $1.50
  4. $1.20
  5. $1

Got questions? Get instant answers now!

Pizza Alex and his friends go out for pizza and video games once a week. They share the cost of a $15.60 pizza equally. How much does each person pay if the total number sharing the pizza is

2 ?

3 ?

4 ?

5 ?

6 ?

Got questions? Get instant answers now!

Fast Food At their favorite fast food restaurant, the Carlson family orders 4 burgers that cost $3.29 each and 2 orders of fries at $2.74 each. What is the total cost of the order?

$18.64

Got questions? Get instant answers now!

Home Goods Chelsea needs towels to take with her to college. She buys 2 bath towels that cost $9.99 each and 6 washcloths that cost $2.99 each. What is the total cost for the bath towels and washcloths?

Got questions? Get instant answers now!

Zoo The Lewis and Chousmith families are planning to go to the zoo together. Adult tickets cost $29.95 and children’s tickets cost $19.95 . What will the total cost be for 4 adults and 7 children?

$259.45

Got questions? Get instant answers now!

Ice Skating Jasmine wants to have her birthday party at the local ice skating rink. It will cost $8.25 per child and $12.95 per adult. What will the total cost be for 12 children and 3 adults?

Got questions? Get instant answers now!

Everyday math

Paycheck Annie has two jobs. She gets paid $14.04 per hour for tutoring at City College and $8.75 per hour at a coffee shop. Last week she tutored for 8 hours and worked at the coffee shop for 15 hours.

How much did she earn?

If she had worked all 23 hours as a tutor instead of working both jobs, how much more would she have earned?

  1. $243.57
  2. $79.35

Got questions? Get instant answers now!

Paycheck Jake has two jobs. He gets paid $7.95 per hour at the college cafeteria and $20.25 at the art gallery. Last week he worked 12 hours at the cafeteria and 5 hours at the art gallery.

How much did he earn?

If he had worked all 17 hours at the art gallery instead of working both jobs, how much more would he have earned?

Got questions? Get instant answers now!

Writing exercises

In the 2010 winter Olympics, two skiers took the silver and bronze medals in the Men's Super-G ski event. The silver medalist's time was 1 minute 30.62 seconds and bronze medalist's time was 1 minute 30.65 seconds. Whose time was faster? Find the difference in their times and then write the name of that decimal.

The difference: 0.03 seconds. Three hundredths of a second.

Got questions? Get instant answers now!

Find the quotient of 0.12 ÷ 0.04 and explain in words all the steps taken.

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.

.

After reviewing this checklist, what will you do to become confident for all objectives?

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

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