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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

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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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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