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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

where we get a research paper on Nano chemistry....?
Maira Reply
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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