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Wiskunde

Getalbegrip, optelling en aftrekking

Aftrekking

Opvoeders afdeling

Memorandum

1.1 27 848

1.2 18 121

1.3 254 706

2.1 8 486 – 5 456 = 3 030

84 381 – 54 351 = 30 030

86 488 – 56 455 = 30 033

816 823 – 516 523 = 300 300

814 886 – 514 556 = 300 330

2.2 297 300

3.1 (b) R27 414

3.2 (a) 22 526

(b) 65 778

(c) 668 544

Kopkrapper

(a) 378 – 111 = 267 – 110 = 157 – 10 = 147

(b) 2 598 – 1 111 = 1 487 – 1 111 = 376 – 110 = 266

(c) 14 210 – 110 = 14 100 – 100 = 14 000

LEERDERS AFDELING

Inhoud

Aktiwiteit: om ‘n reeks tegnieke te gebruik om berekeninge te doen [lu 1.10]

Om strategieë te gebruik om oplossings te kontroleer [lu 1.11]

1. Jy het nou deur verskeie metodes gewerk om die verskil te bereken. Kies nou enige van hierdie metodes en bereken die volgende:

1.1 __________ = 54 321 – 26 473

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_____________________________________________________________________

_____________________________________________________________________

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1.2 __________= 63 904 – 45 783

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.3 __________= 486 213 – 231 507

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

2. 2.1 Kom ons jaag resies. Kyk of jy jou maat kan wen. Onthou net om netjies te werk. Kyk goed na elke getal.

  • Kyk goed na elke getal.
  • Vervang elke keer die syfer 8 deur ’n 5.
  • Skryf die nuwe getal direk daaronder neer.
  • Bereken dan die verskil tussen die twee getalle en skryf die antwoord in die heelonderste spasie neer.

Bv.

2.2 Wat is die verskil tussen die grootste en kleinste antwoord?

_____________________________________________________________________

2.3 Vergelyk jou antwoorde met jou maat s’n.

2.4 Kontroleer jul antwoorde met ’n sakrekenaar.

3. Nou wys ons jou nog ‘n tegniek om die verskil tussen twee getalle te bereken.

3.1 Werk weer in groepe van drie. Lees die volgende probleme goed deur en kontroleer die oplossings deur dit vir mekaar te verduidelik.

a) Kayla se pa koop ’n splinternuwe Renault Scenic vir R147 293 en Wayne se pa ’n tweedehandse motor vir R69 475. Watter bedrag het Kayla se pa meer betaal?

Kayla se pa betaal R77 818 meer.

b) Roberto moet baie oorsee bel en sy telefoonrekening is gevolglik R30 000. Carli gebruik haar selfoon om oproepe te maak en haar rekening beloop R2 586. Met watter bedrag was Carli se telefoonrekening minder?

Carli betaal R27 414 minder.

3.2 Bereken die volgende deur bogenoemde metode te gebruik:

a) __________= 42 063 – 19 537

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

b) __________= 264 136 – 198 358

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

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c) __________= 900 000 – 231 456

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

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TYD VIR SELFASSESSERING

Ons het nou na verskillende tegnieke/strategieë gekyk om berekeninge te doen en te kontroleer. Hoe voel JY oor die werk wat ons so pas afgehandel het?

Evalueer jouself deur ‘n sirkel te trek om die syfer in die toepaslike blokkie.

** HEELTEMAL ONSEKER BIETJIE SEKER REDELIK SEKER DOOD­SEKER
Ek kan korrek afrond tot die naaste 1 000 1 2 3 4
Ek kan aftrek deur by te tel 1 2 3 4
Ek kan die verskil d.m.v. afronding bereken 1 2 3 4
Ek kan aftrek deur getalle in uitgebreide notasie te hergroepeer 1 2 3 4
Ek kan met negatiewe getalle werk 1 2 3 4
Ek kan vertikaal aftrek 1 2 3 4

** Vra jou opvoeder se hulp.

Kopkrapper!

Jy mag net die volgende sleutels van jou sakrekenaar gebruik:

1 ; – ; 0 ; =

Kyk of jy die eerste getal na die tweede getal kan verander.

Bv . Verander 1 416 na 285

1 416 – 1 110 = 306 – 11 = 295 – 10 = 285

a) Verander 378 na 147

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b) Verander 2 598 na 266

_____________________________________________________________________

c) Verander 14 210 na 14 000

_____________________________________________________________________

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 1.10: Dit is duidelik wanneer die leerder ‘n verskeidenheid tegnieke gebruik om sowel skriftelike as hoofberekeninge met heelgetalle te doen, insluitend:

1.10.1 optelling en aftrekking in kolomme;

Assesseringstandaard 1.11: Dit is duidelik wanneer die leerder ‘n verskeidenheid strategieë gebruik om oplossings te kontroleer en die redelikheid van oplossings te beoordeel.

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 5. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10993/1.1
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