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Practice makes perfect

Add and Subtract Decimals

In the following exercises, add or subtract.

16.53 24.38

−40.91

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38.69 + 31.47

−7.22

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4.2 + ( 9.3 )

−13.5

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91.75 ( 10.462 )

102.212

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94.69 ( 12.678 )

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Multiply Decimals

In the following exercises, multiply.

( 8.52 ) ( 3.14 )

26.7528

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(−4.3)(2.71)

−11.653

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(−5.18)(−65.23)

337.8914

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( 9.16 ) ( 68.34 )

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( 0.09 ) ( 24.78 )

2.2302

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( 0.06 ) ( 21.75 )

1.305

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( 55.2 ) ( 1,000 )

55,200

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Divide Decimals

In the following exercises, divide.

1.44 ÷ ( 0.3 )

−4.8

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1.75 ÷ ( 0.05 )

35

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1.15 ÷ ( 0.05 )

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Mixed Practice

In the following exercises, simplify.

24 ( 0.5 ) + ( 0.3 ) 2

12.09

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1.15 ( 26.83 + 1.61 )

32.706

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$45 + 0.08 ( $45 )

$48.60

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18 ÷ ( 0.75 + 0.15 )

20

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( 1.43 + 0.27 ) ÷ ( 0.9 0.05 )

2

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( 1.5 0.06 ) ÷ ( 0.12 + 0.24 )

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[ $75.42 + 0.18 ( $75.42 ) ] ÷ 5

$17.80

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[ $56.31 + 0.22 ( $56.31 ) ] ÷ 4

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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

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

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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

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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?

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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

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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?

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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

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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?

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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

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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?

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

$296.00

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

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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

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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?

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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

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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 ?

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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

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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?

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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

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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?

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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

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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?

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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.

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

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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

Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Ummi Reply
omeprazole
Kamara
what
Renee
what is this
Renee
is a drug
Kamara
of anti-ulcer
Kamara
Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
what is anatomy
Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
what is the normal body temperature
Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
please why 37 degree selcius normal temperature
Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
what is anaemia
Diya Reply
anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
what is the pH of the vagina
Diya Reply
how does Lysin attack pathogens
Diya
acid
Mary
I information on anatomy position and digestive system and there enzyme
Elisha Reply
anatomy of the female external genitalia
Muhammad Reply
Organ Systems Of The Human Body (Continued) Organ Systems Of The Human Body (Continued)
Theophilus Reply
what's lochia albra
Kizito
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Source:  OpenStax, Prealgebra. OpenStax CNX. Jul 15, 2016 Download for free at http://legacy.cnx.org/content/col11756/1.9
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