# 3.4 Tables and checks to arrange and record data

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## To use tables and checks to arrange and record data [lo 5.3]

1. Use your existing knowledge to complete the following table:

 T U t h E.g. 5 9 8 = 5 $\frac{\text{98}}{\text{100}}$ = 5,98 1.1 3 6 = _____ = _____ 1.2 1 7 = _____ = _____ 1.3 3 6 = _____ = _____ 1.4 4 2 8 5 = _____ = _____ 1.5 4 7 0 3 = _____ = _____

Brain-teaser!

What will the following fractions look like if written as decimal fractions on the calculator?

1. $\frac{3}{\text{100}}$ ______

2. $\frac{9}{\text{100}}$ ______

3. $\frac{\text{40}}{\text{100}}$ ______

4. $\frac{\text{80}}{\text{100}}$ ______

5. $\frac{\text{37}}{\text{100}}$ ______

6. $\frac{\text{59}}{\text{100}}$ ______

How do the answers of 3 and 4 differ from the rest?

Why is this?

Did you know?

Normally we don’t write the noughts at the end of decimal fractions, but in the following cases we do:

a) When we work with money : R8,60 (shows how many cents there are).

b) When we time an athlete with a stop-watch : 7,30 seconds. This is how we give results to the hundredth of a second.

1. When Mom buys material : 1,70 m (so that the saleslady knows exactly how many cm to cut).

## To recognise and represent numbers [lo 1.3.3]

1. It is sometimes difficult to determine exactly where a decimal number fits into the greater whole. A number line is a handy way of helping you to determine this, because it helps you to “see” the sequence of the numbers. Draw arrows and label with the letters given to indicate more or less where the following numbers will be on the number line:

A : 5,82

B : 5,99

C : 6,09

D : 6,24

## To use a series of techniques to do mental arithmetic [lo 1.10.2]

1. Let us play a game!

Work with a friend. Take turns. Close your eyes and press on any number in the diagram on the next page with the back of your pencil. Open your eyes and tell your friend what the number consists of:

e.g. 14,38 = 14 + $\frac{3}{\text{10}}$ + $\frac{8}{\text{100}}$

Colour in every number you get right green. Your friend colours all his / her correct numbers blue. The one who has something wrong misses a turn. The one who has coloured in the most blocks, wins.

## To recognise and classify numbers in order to compare them [lo 1.3.3]

1. By now you know how to write tenths and hundredths as decimal fractions. Look very carefully at the following numbers. Replace the * with<,>or =.

Hint: You should break the numbers up as in the game above if you have any doubts about the correct answer.

1.1 1,7 * 1,07 _____

1.2 0,6 * 0,06 _____

1.3 0,58 * 0,9 _____

1.4 0,34 * 0,4 _____

1.5 2,05 * 2,5 _____

1.6 1,8 * 1,80 _____

Brain-teaser!

What does one quarter ( $\frac{1}{4}$ ) look like as a decimal fraction?

Can you write the following as decimal fractions?

a) $\frac{3}{4}$ : _____

b) $\frac{1}{\text{25}}$ : _____

c) $\frac{3}{\text{20}}$ : _____

d) $\frac{\text{17}}{\text{50}}$ : _____

## To use tables and checks in order to arrange and record data [lo 5.3]

1. Challenge!

Take a measuring tape and measure the height of five of your class mates (to 2 digits after the decimal comma). List your results in a table and number your friends from the shortest to the tallest.

 Name Height Numbered:short to tall 1.1 1.2 1.3 1.4 1.5

## Thousandths

Did you know?

When I write one thousandth $\frac{1}{\text{1000}}$ as a decimal fraction, it will be 0,001.

#### Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
what does nano mean?
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
are you nano engineer ?
s.
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.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
how did you get the value of 2000N.What calculations are needed to arrive at it
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