Decimals: reading and writing decimals  (Page 2/2)

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Sample set a

6.8

Some people read this as "six point eight." This phrasing gets the message across, but technically, "six and eight tenths" is the correct phrasing.

14.116

0.0019

81

Eighty-one

In this problem, the indication is that any whole number is a decimal fraction. Whole numbers are often called decimal numbers .

$\text{81}=\text{81}\text{.}0$

Practice set a

12.9

twelve and nine tenths

4.86

four and eighty-six hundredths

7.00002

seven and two hundred thousandths

0.030405

thirty thousand four hundred five millionths

Writing a decimal fraction

To write a decimal fraction,
1. Write the whole number part.
2. Write a decimal point for the word "and."
3. Write the decimal part of the number so that the right-most digit appears in the position indicated in the word name. If necessary, insert zeros to the right of the decimal point in order that the right-most digit appears in the correct position.

Sample set b

Write each number.

Thirty-one and twelve hundredths.

The decimal position indicated is the hundredths position.

31.12

Two and three hundred-thousandths.

The decimal position indicated is the hundred thousandths. We'll need to insert enough zeros to the immediate right of the decimal point in order to locate the 3 in the correct position.

2.00003

Six thousand twenty-seven and one hundred four millionths.

The decimal position indicated is the millionths position. We'll need to insert enough zeros to the immediate right of the decimal point in order to locate the 4 in the correct position.

6,027.000104

Seventeen hundredths.

The decimal position indicated is the hundredths position.

0.17

Practice set b

Write each decimal fraction.

Three hundred six and forty-nine hundredths.

306.49

Nine and four thousandths.

9.004

Sixty-one millionths.

0.000061

Exercises

For the following three problems, give the decimal name of the posi­tion of the given number in each decimal fraction.

1. 3.941
9 is in the position.
4 is in the position.
1 is in the position.

Tenths; hundredths, thousandths

17.1085
1 is in the position.
0 is in the position.
8 is in the position.
5 is in the position.

652.3561927
9 is in the position.
7 is in the position.

Hundred thousandths; ten millionths

For the following 7 problems, read each decimal fraction by writing it.

9.2

8.1

eight and one tenth

10.15

55.06

fifty-five and six hundredths

0.78

1.904

one and nine hundred four thousandths

10.00011

For the following 10 problems, write each decimal fraction.

Three and twenty one-hundredths.

3.20

Fourteen and sixty seven-hundredths.

One and eight tenths.

1.8

Sixty-one and five tenths.

Five hundred eleven and four thousandths.

511.004

Thirty-three and twelve ten-thousandths.

Nine hundred forty-seven thousandths.

0.947

Two millionths.

Seventy-one hundred-thousandths.

0.00071

One and ten ten-millionths.

Calculator problems

For the following 10 problems, perform each division using a calculator. Then write the resulting decimal using words.

$3÷4$

seventy-five hundredths

$1÷8$

$4÷\text{10}$

four tenths

$2÷5$

$4÷\text{25}$

sixteen hundredths

$1÷\text{50}$

$3÷\text{16}$

one thousand eight hundred seventy-five ten thousandths

$\text{15}÷8$

$\text{11}÷\text{20}$

fifty-five hundredths

$9÷\text{40}$

Exercises for review

( [link] ) Round 2,614 to the nearest ten.

2610

( [link] ) Is 691,428,471 divisible by 3?

( [link] ) Determine the missing numerator.
$\frac{3}{14}=\frac{?}{\text{56}}$

12

( [link] ) Find $\frac{3}{\text{16}}\text{of}\frac{\text{32}}{\text{39}}$

( [link] ) Find the value of $\sqrt{\frac{\text{25}}{\text{81}}}+{\left(\frac{2}{3}\right)}^{2}+\frac{1}{9}$

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absolutely yes
Daniel
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it is a goid question and i want to know the answer as well
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Abigail
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fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
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is Bucky paper clear?
CYNTHIA
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for screen printed electrodes ?
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or in general
Ebrahim
in general
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many many of nanotubes
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what is the function of carbon nanotubes?
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I'm interested in nanotube
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what is system testing
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anybody can imagine what will be happen after 100 years from now in nano tech world
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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
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name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
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silver nanoparticles could handle the job?
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not now but maybe in future only AgNP maybe any other nanomaterials
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Uday
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