# 1.3 Rounding whole numbers  (Page 2/2)

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Round 9,614,018,007 to the nearest ten million.

1. We are rounding to the nearest ten million.
2. Observe the digit immediately to the right of the ten millions position. It is 4. Since 4 is less than 5, we round down by replacing 4 and all the digits to its right with zeros.
9,610,000,000

Thus, 9,614,018,007 rounded to the nearest ten million is 9,610,000,000.

Round 148,422 to the nearest million.

1. Since we are rounding to the nearest million, we'll have to imagine a digit in the millions position. We'll write 148,422 as 0,148,422.
2. The digit immediately to the right is 1. Since 1 is less than 5, we'll round down by replacing it and all the digits to its right with zeros.
0,000,000
This number is 0.

Thus, 148,422 rounded to the nearest million is 0.

Round 397,000 to the nearest ten thousand.

1. We are rounding to the nearest ten thousand.
2. The digit immediately to the right of the ten thousand position is 7. Since 7 is greater than 5, we round up by replacing 7 and all the digits to its right with zeros and adding 1 to the digit in the ten thousands position. But $9+1=10$ and we must carry the 1 to the next (the hundred thousands) position.
400,000

Thus, 397,000 rounded to the nearest ten thousand is 400,000.

## Practice set a

Use the method of rounding whole numbers to solve each problem.

Round 3387 to the nearest hundred.

3400

Round 26,515 to the nearest thousand.

27,000

Round 30,852,900 to the nearest million.

31,000,000

Round 39 to the nearest hundred.

0

Round 59,600 to the nearest thousand.

60,000

## Exercises

For the following problems, complete the table by rounding each number to the indicated positions.

1,642

 hundred thousand ten thousand million
 hundred thousand ten thousand million 1,600 2000 0 0

5,221

 hundred thousand ten thousand million

91,803

 Hundred thousand ten thousand million
 Hundred thousand ten thousand million 91,800 92,000 90,000 0

106,007

 hundred thousand ten thousand million

208

 hundred thousand ten thousand million
 hundred thousand ten thousand million 200 0 0 0

199

 hundred thousand ten thousand million

863

 hundred thousand ten thousand million
 hundred thousand ten thousand million 900 1,000 0 0

794

 hundred thousand ten thousand million

925

 hundred thousand ten thousand million
 hundred thousand ten thousand million 900 1,000 0 0

909

 hundred thousand ten thousand million

981

 hundred thousand ten thousand million
 hundred thousand ten thousand million 1,000 1,000 0 0

965

 hundred thousand ten thousand million

551,061,285

 hundred thousand ten thousand million
 hundred thousand ten thousand million 551,061,300 551,061,000 551,060,000 551,000,000

23,047,991,521

 hundred thousand ten thousand million

106,999,413,206

 Hundred thousand ten thousand million
 hundred thousand ten thousand million 106,999,413,200 106,999,413,000 106,999,410,000 106,999,000,000

5,000,000

 hundred thousand ten thousand million

8,006,001

 hundred thousand ten thousand million
 Hundred Thousand ten thousand Million 8,006,000 8,006,000 8,010,000 8,000,000

94,312

 hundred thousand ten thousand million

33,486

 hundred thousand ten thousand million
 hundred thousand ten thousand million 33,500 33,000 30,000 0

560,669

 hundred thousand ten thousand million

388,551

 hundred thousand ten thousand million
 hundred thousand ten thousand million 388,600 389,000 390,000 0

4,752

 hundred thousand ten thousand million

8,209

 hundred thousand ten thousand million
 hundred thousand ten thousand million 8,200 8,000 10,000 0

In 1950, there were 5,796 cases of diphtheria reported in the United States. Round to the nearest hundred.

In 1979, 19,309,000 people in the United States received federal food stamps. Round to the near­est ten thousand.

19,310,000

In 1980, there were 1,105,000 people between 30 and 34 years old enrolled in school. Round to the nearest million.

In 1980, there were 29,100,000 reports of aggra­vated assaults in the United States. Round to the nearest million.

29,000,000

For the following problems, round the numbers to the posi­tion you think is most reasonable for the situation.

In 1980, for a city of one million or more, the average annual salary of police and firefighters was $16,096. The average percentage of possible sunshine in San Francisco, California, in June is 73%. 70% or 75% In 1980, in the state of Connecticut,$3,777,000,000 in defense contract payroll was awarded.

In 1980, the federal government paid $5,463,000,000 to Viet Nam veterans and depen­dants.$5,500,000,000

In 1980, there were 3,377,000 salespeople em­ployed in the United States.

In 1948, in New Hampshire, 231,000 popular votes were cast for the president.

230,000

In 1970, the world production of cigarettes was 2,688,000,000,000.

In 1979, the total number of motor vehicle regis­trations in Florida was 5,395,000.

5,400,000

In 1980, there were 1,302,000 registered nurses the United States.

## Exercises for review

( [link] ) There is a term that describes the visual displaying of a number. What is the term?

graphing

( [link] ) What is the value of 5 in 26,518,206?

Forty-two thousand, one hundred nine

( [link] ) Write "six hundred twelve" using digits.

( [link] ) Write "four billion eight" using digits.

4,000,000,008

find the 15th term of the geometric sequince whose first is 18 and last term of 387
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
can someone help me with some logarithmic and exponential equations.
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
Commplementary angles
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
hi
salma
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
a perfect square v²+2v+_
kkk nice
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or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
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China
Cied
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I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
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Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
what is nano technology
what is system testing?
preparation of nanomaterial
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
what is system testing
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
how did you get the value of 2000N.What calculations are needed to arrive at it
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