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Wiskunde

Graad 4

Heelgetalle en hul verwantskappe

Module 1

Om te tel

Aktiwiteit 1:

Om aan te tel en terug te tel in 2’s; 3’e; 5’e; 10’e; 25’s; 50’s en 100’e van 0 tot by 10 000

[LU 1.1]

Om aan te tel en terug te tel in 2’s; 3’e; 5’e; 10’e; 25’s; 50’s en 100’e van 0 tot by 10 000

[LU 1.10.5]

Om hoofrekene wat optel en aftrek behels te doen [LU 1.9.1]

GETALLE, BEWERKINGS EN VERHOUDINGS

  • Getalle is wonderbaarlik. Ons het hulle elke dag van ons lewens nodig. Welkom in die wonderlike wêreld van getalle, syfers en simbole. Kom laat ons saam reis en hierdie wêreld verken.

1. TEL IN DIE ALLEDAAGSE WêRELD

  • Tydens die Grondslagfase het jy geleer om tot minstens 1 000 te tel. Kom ons kyk hoe goed jy die volgende oefening kan doen.
  • Elke dag moet lugdienste met baie getalle werk. Verbeel jou dat jy een van die grondpersoneel is en dat jy papierkoppies vir die passasiers op die vliegtuig moet tel.

1.1 Jy tel in 2’s en het 592 bereik. Skryf die volgende vyf nommers neer:

1.2 Jy kan besluit dat dit vinniger is om in 5’e te tel. Jy kom tot 980. Skryf die volgende vyf nommers neer:

1.3 Jy is steeds besig met die tel van papierkoppies vir die vliegtuig en besluit om eerder in tiene te tel. Jy kom tot 660. Skryf die volgende vyf nommers neer:

1.4 Jy is nou baie haastig! Jy tel in 25’s en kom tot 725. Skryf die volgende vyf nommers neer:

1.5 Jy het genoeg koppies vir ‘n maand! Tel in 50’s vanaf 800 tot by eenduisend en vyftig. Skryf hierdie getalle neer:

1.6 Die vliegtuig gaan nou opstyg en jy is werklik haastig! Tel die koppies in honderde van 0 tot 1 100 en skryf die laaste vyf getalle neer:

1.7 Die afstand tussen Kaapstad en Johannesburg is eenduisend vierhonderd en twee kilometer. Skryf hierdie afstand in syfers:

2. LAAT JOU SAKREKENAAR VIR JOU TEL

  • Ons weet nou dat jy tot 1 000 kan tel. Kan jy jou sakrekenaar kry om in 2’s te tel sonder om elke keer +2 te druk?

Hoe om jou sakrekenaar te laat tel:

2.1 Maak jou sakrekenaar se skerm skoon.

Druk 2  = = = =

Vir party sakrekenaars is dit nodig om die volgende bevel te gee: 2   = = = = of

2  K = = = =

Vind uit hoe jou sakrekenaar werk.

2.2 Laat jou sakrekenaar by 1 004 begin en tel verder in 2’s.

Maak jou sakrekenaar se skerm skoon. Druk nou 1 004 + 2 = = = =

Sommige sakrekenaars benodig: 2 + + 1 004 = = = =

2.3 Hoe sal jou sakrekenaar "terugtel"?

Maak jou sakrekenaar se skerm skoon. Begin met 7 190 en tel terug in 2’s.

Onthou om altyd jou sakrekenaar se skerm skoon te maak ( clear ) voordat jy begin. Nou is jy reg om met die “Groepwerk” te begin.

Jy behoort die volgende oefeninge vir ten minste vyf minute elke dag vir die res van die eerste kwartaal te doen totdat jy dit maklik kan doen. Getalle kan verander word.

3. AANTEL EN TERUGTEL (Mondelinge groepwerk):

Noudat jy geleer het hoe jou sakrekenaar met intervalle kan aantel en terugtel, moet jy kyk of jy self ook nog kan tel – hardop. Julle mag in groepe werk. Net een van die leerders in die groep mag 'n sakrekenaar gebruik. Julle opvoeder sal verduidelik hoe julle hierdie speletjie moet speel. Luister dus aandagtig.

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 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11100/1.1
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