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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

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
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
Google
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
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
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
Brian Reply
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?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
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 ?
Bob Reply
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?
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
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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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