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Wiskunde

Persentasies

Opvoeders afdeling

Memorandum

  • a) (i) 1 8 size 12{ { { size 8{1} } over { size 8{8} } } } {} / 12 , 5 100 size 12{ { { size 8{"12",5} } over { size 8{"100"} } } } {} / 125 1000 size 12{ { { size 8{"125"} } over { size 8{"1000"} } } } {}

(ii) 3 20 size 12{ { { size 8{3} } over { size 8{"20"} } } } {}

  1. 15

( 1 4 size 12{ { { size 8{1} } over { size 8{4} } } } {} van 60)

  1. 9

(15–6)

22.2 a) 1 10 size 12{ { { size 8{1} } over { size 8{"10"} } } } {} van 24 = 2,4

2 uur 24 minute

b) Veldwerk

Fiksheid

c) 1 8 size 12{ { { size 8{1} } over { size 8{8} } } } {}

  1. 3,6 uur

3 uur 36 minute

Leerders afdeling

Inhoud

Aktiwiteit: sirkelgrafieke met persentasie (%) [lu 2.6, lu 5.8, lu 5.9]

22. SIRKELGRAFIEKE MET PERSENTASIE (%)

22.1 Bestudeer die volgende sirkelgrafiek saam met ’n maat en beantwoord dan die vrae wat volg:

’n Graad 7-klas se musieksmaak lyk so:

a) Watter breuk van die leerders hou van

(i) klassieke musiek? .........................

(ii) geestelike musiek? .........................

b) As daar 60 leerders in die klas is, hoeveel luister na “rap”?

…………………………………………………………………………………………..

…………………………………………………………………………………………..

c) Hoeveel minder leerders luister na Boeremusiek as na “rap”?

…………………………………………………………………………………………..

…………………………………………………………………………………………..

d) Wat is JOU gunsteling musiek?

…………………………………………………………………………………………..

22.2 Kyk ook na die sirkelgrafiek in verband met die Suid-Afrikaanse krieketspan se daaglikse roetine. Beantwoord die volgende vrae:

a) Hoeveel uur is daar per dag vir ontspanning?

…………………………………………………………………………………………..

…………………………………………………………………………………………..

b) Waaraan word daar ewe veel tyd spandeer?

…………………………………………………………………………………………..

…………………………………………………………………………………………..

c) Watter breuk van die dag word aan boulwerk bestee?

…………………………………………………………………………………………..

…………………………………………………………………………………………..

d) Hoeveel uur per dag word aan fiksheidsoefeninge afgestaan?

…………………………………………………………………………………………..

…………………………………………………………………………………………..

23. UITDAGING!

Kan jy ’n kolomgrafiek trek van enige van die bogenoemde sirkelgrafieke?

24. Tyd vir self-assessering

  • Maak ’n regmerkie in die toepaslike kolom:
JA NEE
Ek kan % van bedrae bereken (nr. 15.1 – 15.3)
Ek kan een hoeveelheid as ’n % van ’n ander hoeveelheid skryf (nr. 16.1 – 16.3)
Ek kan % afslag bereken
Ek kan % verhoging bereken
Ek kan wins bereken
Ek kan verlies bereken
Ek kan die BTW op items bereken
Ek kan sirkelgrafieke interpreteer en vrae daaroor beantwoord
Ek kan ’n kolomgrafiek trek

Assessering

Leeruitkomste 2: Die leerder is in staat om patrone en verwantskappe te herken, te beskryf en voor te stel en probleme op te los deur algebraïese taal en vaardighede te gebruik.

Assesseringstandaard 2.6: Dit is duidelik wanneer die leerder ‘n situasie beskryf deur ‘n grafiek daarvan te interpreteer, of ‘n grafiek van ‘n beskrywing van ‘n situasie teken (bv. die hoogte van ‘n wipwaentjie oor tyd; die spoed van ‘n resiesmotor wat om ‘n baan beweeg);

Leeruitkomste 5: Die leerder is in staat om data te versamel, op te som, voor te stel en krities te ontleed om gevolgtrekkings en voorspellings te maak en om toevallige variasie te interpreteer en te bepaal.

Assesseringstandaard 5.8: Dit is duidelik wanneer die leerder ‘n verskeidenheid grafieke met die hand of met behulp van tegnologie teken om data voor te stel en te interpreteer (gegroepeer en ongegroepeer),

Assesseringstandaard 5.9: Dit is duidelik wanneer die leerder data wat op verskeie maniere voorgestel is krities lees en interpreteer ten einde gevolgtrekkings en voorspellings te maak.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
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?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
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?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
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?
s. Reply
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
Devang Reply
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
Abhijith Reply
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?
s. Reply
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 ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
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
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 7. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11076/1.2
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