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Wiskunde

Graad 8

Getallestelsel

(natuurlike- en telgetalle)

Module 5

Vermenigvuldiging in algebra

KLASOPDRAG 1

  • Kom ontdek stap vir stap meer omtrent VERMENIGVULDIGING in ALGEBRA….

1. Waaraan sal die volgende gelyk wees aan? .....

1.1: 2 x 2 x 2 = ......................... (en in eksponensiële vorm? ......................... )

1.2: 2² x 2² x 2 3 x 3² x 3 3 = .........................

(en in eksponensiële vorm? ......................... )

  • :a x a x a = .........................

1.4: a ² x a ² x a 3 = .........................

Skryf nou ‘n algemene reël vir die vermenigvuldiging van eksponente hier neer:

1.5: 2( a - b ) = .........................

distributiewe wet: (2 x a ) - (2 x b )

1.6: 3 0 = .........................

1.7: a ( a + b ) 0 = .........................

Dus : (enige iets) tot die mag 0 = .........................

1.8: 3 1 = .........................

1.9: 1 200 = .........................

2. Wat beteken elk van die volgende? Gee dan die vereenvoudigde antwoord van elk.

2.1: a ² =

2.2: 2 ab =

2.3: -3( a + b ) =

2.4: 4( a )² =

2.5: ( a 3 )² =

2.6: (3 a ²) 3 =

2.7: 2 p x 3 p =

2.8: ab ² x a ² b 3 x ab 6 =

2.9: ( 1 2 size 12{ { { size 8{1} } over { size 8{2} } } } {} a 3 ) 4 =

2.10: 2( a 3 )² =

2.11: 6(2 a - 3 b ) =

2.12: -7 a ( a ² - 2 b ² ) =

3. Kan jy nog die volgorde van bewerkings onthou? Skryf dit neer.....

3.1 Bereken nou die volgende deur alles wat jy tot dusver geleer het, te onthou:

3.1.1: a x a x aaa + a 4

3.1.2: 2( a + b ) - 3( a - b )

3.1.3: 3 a x 2 a ²b + 5 a ² x (-3 ab )

3.1.4 : -5 a ( a - b 3 ) + 7 ab 3 - 2 a 5

3.1.5: -3( a ² b 4 )² - 5 a 3 (-2 a 4 b ²) 3

4. Wat beteken die woord substitusie?

Gee ‘n voorbeeld om ter verduideliking:

5. As a = 5 ; b = -1 en c = 3 , bereken die waarde van elk van die volgende:

5.1: 5 a ² - 3 b

5.2: 2 ab 2 3a size 12{ { {2 size 11{ bold "ab" rSup { size 8{2} } }} over { size 12{3a} } } } {}

5.3: a + b ² a b size 12{ { { size 11{a}" "+" " size 11{b}²} over { size 11{a}` - ` size 11{b}} } } {}

5.4: (2 ab ² c

5.5: -3 ab 3 - 2 ab 3 c

HUISWERKOPDRAG 1

1. Vereenvoudig elk van die volgende:

1.1: ( a 5 ) 6

1.2: 5(3 a - 7 a

1.3: -5(3 a - 2 b )

1.4: (3 a )² . [ (2 a )² ] 3

1.5: p x 2 x m x q

1.6: w ² x 3 b x 1 / 3 b x w

1.7: -5 a ( 3 a - 5 ab )

1.8: (3 a )² (2 a ) + (4 a ²) (-2 a )

1.9: (5 ab ²) 4 - (- 6 b 6 a 4 )

1.10: -6 a ² b ( 2 a ² - 3 ab 3 + 5)

2. As x = -2 en y = -1 , bepaal die waarde van ...

2.1: (2 y )(2 x size 12{x} {}

2.2: -3 x size 12{x} {} 3 - 2 y 5

2.3: (2 y + 2 x size 12{x} {}

3. As m = 2 ; n = -3 en q = 5, bepaal die waarde van elk van die volgende uitdrukkings:

3.1: m + n + q

3.2: 4 m - 2 n - 3 q

3.3: 2( m ² + q ²) - n ²

3.4: m / 3 + n / 4 - q

3.5: 3 m ( n + q ) - 2( m + n ²)

4. Uitdaging: Kyk of jy met al die kennis tot jou beskikking die volgende probleme kan oplos.

4.1 Die gemiddelde spoed van ‘n Intercape Mainliner is 5 a 4 kilometer per uur.Watter afstand sal die bus in (5 a 3 + 5 a - 6) uur aflê?

4.2 Mej. Suid - Afrika koop ( a - b + 2 c ) liter melk teen 4ab rand per liter en 5ab liter vrugtesap teen (2 a + 5 b - 3 c ) rand per liter.

Wat sal die bogenoemde altesaam kos?

Assessering 2.3

Assessering van myself: deur myself: Assessering deur opvoeder:
Ek kan… 1 2 3 4 Kritieke Uitkomste 1 2 3 4
uitdrukkings in eksponensiële vorm skryf; (Lu 2.2; 1.6.3) Kritiese en skeppende denke
eksponente suksesvol bymekaar tel; (Lu 2.2; 1.6.3) Deelname
eksponente suksesvol van mekaar aftrek; (Lu 2.2; 1.6.3) Organisering en bestuur
eksponente suksesvol met mekaar vermenigvuldig; (Lu 2.2; 2.8.3&.4) Prosessering van inligting
uitdrukkings met hakies oplos; (Lu 2.2; 2.8.5) Kommunikasie
die volgorde van bewerkings onthou; (Lu 2.2; 2.8.5) Probleemoplossing
waardes van uitdrukkings bereken d.m.v. substitusie. (Lu 2.2; 2.8.5; 1.6.2; 1.6.3)
Selfstandigheid

Questions & Answers

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Muhammad Reply
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Muhammad
is the branch of biology that deals with the study of microorganisms.
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Mercy Reply
studies of microbes
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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
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Muhamad
they make spores
Louisiaste
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the significance of food webs for disease transmission
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food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
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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
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Shu Reply
Give Examples of thermophilic organisms
Shu
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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
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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
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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 ❣️
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Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
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part of a tissue or an organ being wounded or bruised.
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Binomial nomenclature
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Source:  OpenStax, Wiskunde graad 8. OpenStax CNX. Sep 11, 2009 Download for free at http://cnx.org/content/col11033/1.1
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