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Summary

Summary Gr 9 Wiskunde Kwartaal 1 en 2 Opsommings

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Gr 9 Wiskunde Kwartaal 1 en 2 Opsommings

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Die Reële Getallestelsel
Soorte vrae:
1. Tussen watter 2 heelgetalle lê elk van die volgende irrasionale getalle?
2. Gee die eerste 12 vierkantsgetalle
3. Gee die eerste 7 kubieke getalle
4. Gee die veelvoude van 8
5. Bepaal KGV van 8 en 14
6. Gee faktore van 30
7. Bepaal GGD van 30 en 45
8. Skryf elke getal as die produk van sy priemfaktore en bepaal dan sy GGD van:
36 en 105
36 = 4 x 9
= 2² x 3²

105 = 3 x 5 x 7

∴GGD is 3




Verhoudings, Koers en Eweredigheid

,Direkte Eweridgiheid (hoe meer: hoe meer)
x
Formule: (gaan n reguit lyn grafiek wees)
y
Indirekte of omgekeerde Eweredigheid (hoe meer: hoe minder)
Formule: x × y (gaan n kurwe lyn grafiek wees)
Toets in tabel:
2 3 4
3 2 1
0 0 5
Maal x met y om dieselfde antwoord te kry = Indirekte of omgekeerde
eweredigheid

60 60 60
Spoed, Afstand en Tyd
A
Formule:
S.T


Verhoudings
Vermeerder 835 in 7:5
835 7
= × (grootste een bo)
1 5
= 1169
Verminder R80 in 7:8
80 7
= × (kleinste een bo)
1 8
Vereenvoudig
1 1 1
; ;
2 3 4
6 4 3
= ; ;
12 12 12
=6;4;3
Soorte vrae:
1. Skryf elk van die verhoudings in eenvoudigste vorm
64 ; 48 ; 80
=4;3;5 (8 gaan in elkeen)




1 2
2. Verdeel R4803 in die verhouding ;
2 3

, 1 2
;
2 3
3 4
= ; (3 ; 4)
6 6
7
=
6
3 4803 3 686
1st antwoord × = × =R 2058
7 1 1 1
1st bedrag R2058
4 4803 4 686
2de antwoord × = × =R 2744
7 1 1 1
2de bedrag R2744

3. Verdeel 110 lekker tussen Daniel en Carl in die verhouding 5 ; 6
5;6 11

5 110
Daniel × =50
11 1

6 110
Carl × =60
11 1

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Number of pages
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Written in
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