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Bespreek weer met die leerders die verskillende maniere om vierkante en reghoeke te halveer en in kwarte te verdeel.

Baie konkrete en semi-konkrete werk moet gedoen word wanneer die leerders getalle in kwarte moet verdeel, veral wanneer die getal nie 'n veelvoud van 4 is nie. Maak gebruik van voorwerpe soos vrugte en sagte lekkers wat werklik opgebreek kan word en nie albasters, doppies , klippe, ens. nie.

Later moet dit aan die leerders verduidelik word dat dit van die probleem sal afhang of ons dit in breuke kan opbreek of nie.

Kyk hierna: Pappa het 25 skape en moet hulle in 4 krale jaag. Hoeveel skape moet in elke kraal kom? (Die skaap wat oorbly kan nie opgedeel word nie.)

Pappa slag 25 skape en gaan dit by 4 slaghuise aflaai. Hoeveel sal elke slaghuis kry?

(Die skaap wat oorbly sal beslis in 4 verdeel word.) Bespreek nog voorbeelde hiervan.

Sodra die leerders 4x as 2 keer verdubbel en ÷4 as 2 keer halveer verstaan, kan dit maar gedril word, want hulle moet die tafels ken.

Hierdie is 'n wonderlike manier om leerders meer vertroud te maak met probleemstellings, maar dit verg baie en gereelde oefening. Sodra hulle dit heeltemal snap en met vertroue kan doen, kom hulle met wonderlike idees na vore.

Begin met met 'n baie eenvoudige getalsin, bv. 3 + 4 = □. Laat die leerders eers voorwerpe noem waarmee hulle moontlik kan werk en skryf dit op die bord: bome, blomme, lekkers, skape, honde, ens.

Almal moet probeer. Hou 'n kompetisie tussen die rye en laat hulle dan vir mekaar die probleme stel.

Die vertikale optel - en aftrekbewerkings is gegradeer van eenvoudig tot moeilik sodat dit vir u maklik sal wees om vas te stel waar 'n leerder se probleem lê. U kan dan slegs op die probleem areas konsentreer en soortgelyke oefeninge kan gegee word.

Dit moet 'n patroon wees wat elke 2 blokke herhaal en daarom moet dit dwarsdeur presies dieselfde wees. Hierdie kan ook saam met Tegnologie aangebied word en die leerders kan dan hul eie blokke trek op 'n groter papier.

Verduidelik die afronding tot die naaste R aan die leerders. Laat die leerders ou katalogusse bring en oefen dan die afronding totdat hulle dit verstaan.

Hierdie werkvel sal vir u 'n goeie aanduiding gee van watter leerders instruksies kan volg en uitvoer.

Enige leerder wat in hierdie stadium 'n goeie getalbegrip van honderde, tiene en ene het, behoort hierdie werkvel met gemak te voltooi. Wys vir die leerders daarop dat as hulle nie vertikaal en horisontaal dieselfde antwoord in die ballon kry nie , dan is daar iewers 'n fout en moet hulle die antwoorde vertikaal en horisontaal weer kontroleer.

Nog voorbeelde met kleiner getalle kan ook gegee word:

241620 301026 502948 1045594
60 66 127 253

Meer gevorderde werk word gedoen, maar dit sal die opvoeder baie help as bl. 1 en 2 (die voltooiing van die kalender) met al die leerders gelyktydig gedoen word. Daarna kan groepe 2 en 3 weer terugkeer na die werk waarmee hulle besig is.

Getalbegrip tot 400

Bewerkings:

Optel – tweesyfergetalle by tweesyfergetalle, met hergroepering van ‘n tien;

Aftrek – tweesyfergetalle van tweesyfergetalle, met hergroepering van ‘n tien;

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 3. OpenStax CNX. Oct 14, 2009 Download for free at http://cnx.org/content/col11129/1.1
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