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8 x 6 = 6 x ____

23 x ____ = 13 x 23

124 x 85 = ____ x 124

2. Is die volgende waar of onwaar?

2.1 6 × 3 × 4 = 3 × 4 × 6 = 4 × 6 × 3

2.2 (2 × 4) × 5 = (5 × 4) × 2 = 4 × (2 × 5)

3. Watter afleiding kan jy maak uit bogenoemde voorbeelde?

Aktiwiteit 8:

Om te skat en te bereken deur middel van afronding [lu 1.8.1]

1. Om antwoorde te kan skat, is ‘n belangrike vaardigheid. As jy goed kan skat, sal jy makliker agterkom wanneer jy moontlik ‘n fout met jou berekeninge kon begaan het. Rond eers die volgende getalle af en skat so wat die produk van die volgende sal wees:

SOM SKATTING SAKREKENAAR VERSKIL
Bv. 19 × 21 400 399 1
a) 38 × 27 ......................... ......................... .........................
b) 99 × 146 ......................... ......................... .........................
c) 45 × 69 ......................... ......................... .........................
d) 998 × 78 ......................... ......................... .........................
e) 409 × 18 ......................... ......................... .........................

Kopkrappers!

a) Watter twee getalle kleiner as 10 het elk 3 faktore?

________ en _________

b) Kleur die korrekte blokkie in:

Die produk van enige 2 onewe getalle is altyd ’n EWE ONEWE getal.

c) Watter twee getalle het ’n produk van 48 en ’n som van 16?

________ en _________

Aktiwiteit 9:

Om probleme in konteks te kan oplos [lu 1.6.1]

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

Kom ons hou ‘n vinnige dinkskrum! Jou opvoeder sal jul van die nodige folio voorsien.

1. Deel in groepe van drie en maak so vinnig soos jul kan ‘n lys van al die vervoermiddels wat daar in ons land is.

2. Watter een van bogenoemde kies jy om in te reis? Hoekom?

3. Waar is jou gunsteling sitplek in ‘n:

  1. motor?
  2. skoolbus?
  3. boot?
  4. vliegtuig?

4. Kyk of jy nou al die volgende probleme kan oplos:

Mnre. Slobo, Mugathle en Sisala het elkeen ‘n splinternuwe taxi gekoop om passasiers mee te vervoer. Vir die eerste rit lyk hul planne so:

Eienaar Bedrag per rit per persoon Aantal passasiers km gereis
Slobo R15,80 13 76
Mugathle R14,60 14 84
Sisala R16,25 12 59
  • Wie het die meeste geld gemaak met die eerste rit?
  • As die petrol R1,05 vir elke kilometer wat gereis is, gekos het, wat was mnr. Mugathle se petrolrekening?
  • As almal in mnr. Slobo se taxi atlete was en terug moes draf, hoe ver het hul altesaam gedraf?
  • Verduidelik aan die res van die klas hoe julle groep die antwoorde bereken het.
  • Vergelyk jul metodes. Hoe verskil hulle van mekaar?
  • Gebruik ‘n sakrekenaar om die antwoorde te kontroleer.

Aktiwiteit 10:

Om die gelykwaardigheid en geldigheid van verskillende voorstellings te bepaal [lu 2.6.3]

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

1. By Aktiwiteit 9 het julle jul eie tegnieke en strategieë gebruik om die probleme op te los. In jul terugvoering aan die klas het jul seker gesien dat daar talle maniere is waarop ons getalle kan vermenigvuldig. Verdeel in groepe van drie. Lees die volgende probleem en kyk dan of julle al die verskillende oplossings verstaan.

’n Saal moet vol stoele gepak word. Daar moet 23 rye met 16 stoele in elke ry wees. Hoeveel stoele moet uitgepak word?

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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