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Wiskunde

Persentasies

Opvoeders afdeling

Memorandum

17.4

a) R179,97

b) R254,58 (afgerond)

c) R10 665

d) R16 794,75

17.5.2

a) 10,7%

b) 10%

Leerders afdeling

Inhoud

Aktiwiteit: persentasie – afslag en verhoging [lu 1.7, lu 2.7.1]

17. PERSENTASIE – AFSLAG EN VERHOGING

17.1 Kyk na die volgende advertensies:

17.2 Het jy geweet?

KOSPRYS : die bedrag wat die handelaar vir ’n artikel betaal

MERKPRYS : dis die bedrag op die artikel

VERKOOPPRYS : dit is die prys na afslag

WINS : verkoopprys – kosprys

17.3 Werk saam met ’n maat deur die volgende probleem en oplossings:

(i) Die prys van ’n bakkie margarien is R6,99. As die prys met 10% gaan styg, hoeveel sal jy voortaan vir die margarien moet betaal??

a) Nuwe prys is R6,99 + 10% van R6,99

= R6,99 + 70 c (afgerond)

= R7,69

b) Nuwe prys is (100 + 10)% van R6,99

= 110% van R6,99

= R7,69 (afgerond)

Wie se metode verkies jy? ..................................................

Hoekom? ………………………………………………………………………………

………………………………………………………………………………………….

………………………………………………………………………………………….

(ii) Top Tiener Tooisels het ’n 20% afslag op alle T-hemde. As die hemp oorspronklik R189,90 gekos het, wat sal jy nou daarvoor betaal?

a)

Ek betaal nou net 80% (100% - 20% afslag)

Dus: 80 100 × 189 , 90 1 size 12{ { { size 8{"80"} } over { size 8{"100"} } } times { { size 8{"189","90"} } over { size 8{1} } } } {}

= R 151, 92

b)

20% van R189,90 = 20 100 × 189 , 90 1 size 12{ { { size 8{"20"} } over { size 8{"100"} } } times { { size 8{"189","90"} } over { size 8{1} } } } {}

Die afslag is dus R37,98

Ek betaal R189,90 – R37,98 = R151,92

Watter metode verkies jy? ..................................................

Hoekom? ………………………………………………………………………………

………………………………………………………………………………………….

………………………………………………………………………………………….

17.4 Wat sal jy vir die volgende items betaal?

17.5.1 Belangrik om te onthou

17.5.2 Deel in groepe van drie. Kan julle bereken hoeveel % afslag op die volgende items gegee is?

17.5.3 Verduidelik jul metodes(s) aan die res van die klas.

Assessering

Leeruitkomste 1: Die leerder is in staat om getalle en die verwantskappe daarvan te herken, te beskryf en voor te stel, en om tydens probleemoplossing bevoeg en met selfvertroue te tel, te skat, te bereken en te kontroleer.

Assesseringstandaard 1.7: Dit is duidelik wanneer die leerder skat en bereken deur geskikte bewerkings vir probleme wat die volgende behels, te kies en te gebruik:

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 2.7: Dit is duidelik wanneer die leerder die ekwivalensie van verskillende beskrywings van dieselfde verhouding of reël, bepaal, ontleed en interpreteer, wat soos volg voorgestel word:

2.7.1 woordeliks.

Questions & Answers

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
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
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
How can I make nanorobot?
Lily
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
how can I make nanorobot?
Lily
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
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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