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Wiskunde

Graad 5

Vermenigvuldiging en deling

Module 30

Vermenigvuldiging

Vermenigvuldiging

Aktiwiteit 1:

Om die veelvoude van enkelsyfergetalle te herken en voor te stel [lu 1.3.6]

Ek dink jy weet reeds hoe belangrik dit is om jou tafels goed te ken! In hierdie leereenheid sal dit jou help om sommer vinnig en korrek te vermenigvuldig. Kom ons kyk hoe goed ken jy jou tafels.

1. Haal die vrugtelekkers met die korrekte antwoorde uit die fles. Kleur hulle netjies in en skryf dan die letter van die alfabet wat daarop is neer. Vul so die ontbrekende woord in:

________________is ’n korter manier om herhaalde optelling te doen.

1.1 5 × 4

1.2 2 × 3

1.3 7 × 7

1.4 7 × 4

1.5 5 × 5

1.6 7 × 3

1.7 6 × 4

1.8 9 × 2

1.9 9 × 7

1.10 9 × 9

1.11 7 × 6

1.12 3 × 5

1.13 8 × 8

1.14 12 × 4

1.15 6 × 12

1.16 9 × 12

1.17 6 × 6

Aktiwiteit 2:

Om die faktore van minstens enige tweesyferheelgetal te herken en voor te stel [lu 1.3.7]

  1. Noudat jy presies weet wat “faktore” is, kan jy seker hul belangrikste funksie in vermenigvuldiging sien. Faktore help ons ook om ons antwoorde te toets wanneer ons vermenigvuldig. Ja, jy is reg! Ons gebruik dit om mee te deel wanneer ons wil toets of ons korrek vermenigvuldig het. Kyk nou hoeveel faktorpare jy vir die volgende getalle kan neerskryf.
a) 24 = ____ × ____
= _____ × _____
= _____ × ______
b) 36 = _____ × ______
= _____ × ______
= _____ × ______
= ______ × ______
= ______ × ______

2. Kom ons oefen die faktore nog ‘n bietjie. Kyk na die produkte (getalle) en skryf dan gepaste faktore vir hulle neer. Die eerste een is vir jou gedoen.

42 45 63 54 64
7 × 6 ...................... ...................... ...................... ....................................
72 108 48 88 96
...................... ...................... ...................... ...................... ....................................

Onthou jy ook nog?

Enige getal vermenigvuldig met 0 se antwoord is altyd 0 . (0 × 6 = 0)

Enige getal vermenigvuldig met 1 se antwoord is altyd die getal self. (9 × 1 = 9)

Aktiwiteit 3:

Om hoofrekene te kan doen [lu 1.9.2]

Nou word die faktore vir jou gegee. Al wat jy in jou eerste hoofrekentoets moet doen, is om goed na die vermenigvuldigingstabel en faktore te kyk en dan net die ontbrekende antwoorde neer te skryf. Sommer maklik, of hoe?

X 4 5 6 7 8 9 12
5 20 ............ 30 ............ 40 ............ 60
6 ............ 30 36 42 ............ 54 ............
7 28 ............ 42 ............ 56 ............ 84
8 ............ 40 ............ 56 ............ 72 ............
9 ............ ............ 54 ............ 72 ............ 108
2 48 60 ............ 84 ............ 108 ............

Voltooi: Ek het ......................... reg!

Aktiwiteit 4:

Om verskillende maniere van skryf in verskillende kulture te beskryf en te illustreer [lu 1.2]

Deur getalle te verdubbel kan ons vinniger by die antwoord van ‘n vermenigvuldigsom uitkom. Ons kan dus hier van die Egiptenare leer. Werk saam met ‘n maat en kyk of julle kan uitvind hoe hulle hierdie berekening gedoen het.

28 × 324

1 × 324: 324 (1 × 324)
Verdubbel 324: 648 (2 × 324)
Verdubbel 648: 1 296 (4 × 324)
Verdubbel 1 296: 2 592 (8 × 324)
Verdubbel 2 592: 5 184 (16 × 324)
Dus: 28 × 324 = 9 072

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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