# 2.9 Fractions - 05

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## Memorandum

10. $\frac{2}{3}$ = $\frac{\text{40}}{\text{60}}$ ; $\frac{3}{4}$ = $\frac{\text{45}}{\text{60}}$ ; $\frac{4}{5}$ = $\frac{\text{48}}{\text{60}}$

• a) 0,5 b) 0,25

c) 0,125 d) 0,75

e) 0,55 f) 0,8

g) 0,625 h) 0,875

i) 0,66 j) 0,36

12.3 (1 ÷ 4) + 3 = 3,25

12.4 0,3333333

• a) 0,6666666

b) 0,4545454

12.6 a) 0, $\stackrel{\text{.}}{6}$

b) 0, $\stackrel{\text{.}}{4}\stackrel{\text{.}}{5}$

• a) 0,667

b) 0,455

## Activity: fractions [lo 1.9.2, lo 1.10, lo 1.4]

10. BRAIN-TEASER!

In a competition, Abdul’s dolphin jumps $\frac{2}{3}$ of a metre out of the water. Fatima’s dolphin jumps $\frac{3}{4}$ of a metre out of the water, while Nazir’s dolphin jumps $\frac{4}{5}$ of a metre out of the water. Whose dolphin jumps the highest?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

11.1 Did you know?

To convert common fractions to decimal fractions we make

use of equivalent fractions.

 e.g.
 1 × 2 5 × 2
=
 2 10
= 0,2

11. 2 Convert the following fractions to decimal fractions:

 a) $\frac{1}{2}$ ___________________ b) $\frac{1}{4}$ ___________________ c) $\frac{1}{8}$ ___________________ d) $\frac{3}{4}$ ___________________ e) $\frac{\text{11}}{\text{20}}$ ___________________ f) $\frac{4}{5}$ ___________________ g) $\frac{5}{8}$ ___________________ h) $\frac{7}{8}$ ___________________ i) $\frac{\text{33}}{\text{50}}$ ___________________ j) $\frac{9}{\text{25}}$ ___________________

12. Do you still remember?

If we want to check the above with a calculator, e.g. , we key in: 7 ÷ 8 =

12.2 Check the exercise above (11.2) with your calculator.

12.3 How would you convert 3 and a quarter to a decimal fraction using your calculator?

_____________________________________________________________________

_____________________________________________________________________

12.4 What will $\frac{1}{3}$ look like on a calculator?

Key in 1 ÷ 3 = and write the answer down: __________________________________

Did you know?

We call a fraction like 0,333333333333 a recurring decimal fraction,

and we write it like this: 0, °

12.5

a) What will two thirds ( $\frac{2}{3}$ ) look like on the calculator? _____________________________________________________________________

b) What will five elevenths ( $\frac{5}{\text{11}}$ ) look like on the calculator? _____________________________________________________________________

12.6

Write the above now in the short way:

a) __________________________________________________________________

b) __________________________________________________________________

12.7

a) __________________________________________________________________

b) __________________________________________________________________

13. TIME FOR SELF-ASSESSMENT

• Colour in the applicable block for each of the following:
 I know what rational numbers are 1 2 3 I know an example for a: proper fraction 1 2 3 improper fraction 1 2 3 mixed number 1 2 3 I know how to form equivalent fractions 1 2 3 I can convert fractions to decimal fractions 1 2 3 I know how to key in fractions on a calculator 1 2 3 I know how to show a recurring decimal 1 2 3

## Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.9: We know this when the learner uses a range of techniques to perform calculations including:

1.9.2: using a calculator;

1.10: uses a range of strategies to check solutions and judges the reasonableness of solutions;

Assessment Standard 1.4: We know this when the learner recognises and uses equivalent forms of the rational numbers listed above.

are nano particles real
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
no can't
Lohitha
where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
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