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Wiskunde

Gewone breuke en desimale breuke

Gewone breuke

Opvoeders afdeling

Memorandum

INLEIDING

Daar is 5 modules:

1. Getalbegrip, Optelling en Aftrekking

2. Vermenigvuldiging en Deling

3. Breuke en Desimale Breuke

4. Meting en Tyd

5. Meetkunde; Datahantering en Waarskynlikheid

4 Dit is belangrik dat opvoeders die modules in volgorde (soos hierbo genoem) sal doen, aangesien die leerders die vorige module se kennis en vaardighede benodig vir die daaropvolgende module.

3. GEWONE EN DESIMALE BREUKE (LU 1; 2 EN 5)

LEEREENHEID 1 FOKUS OP GEWONE BREUKE

  • Hierdie module is ‘n voortsetting van die werk wat in graad 5 gedoen is. Daar word uitgebrei op die optelling en aftrekking van breuke, en die berekening van ‘n breuk van ‘n sekere hoeveelheid word ook hersien.
  • Maak seker dat die leerders die korrekte terminologie bemeester het, asook die korrekte strategieë om bogenoemde korrek te bereken.
  • Kritieke Uitkoms 5 (Effektiewe kommunikasie deur visuele, simboliese, en/of taalvaardighede op verskillende maniere te gebruik) is hier van toepassing.
  • 3 weke behoort voldoende te wees om hierdie module te voltooi.
  • ** Aktiwiteit 17 is ‘n taak vir die portefeulje. Hoewel dit ‘n baie eenvoudige opdrag is, moet leerders in staat wees om dit netjies en akkuraat uit te voer. Leerders moet voor die tyd weet hoe opvoeders die taak gaan assesseer.

LEEREENHEID 2 FOKUS OP DESIMALE BREUKE

  • Hierdie module is ‘n uitbreiding op werk wat in graad 5 afgehandel is. Leerders moet nou in staat wees om desimale breuke korrek af te rond tot die naaste tiende, honderdste en duisendste. Beklemtoon weer die korrekte metode om op te tel en af te trek (vertikaal). Gee ook baie aandag aan die vermenigvuldiging en deling van desimale breuke.
  • Aangesien leerders laasgenoemde nogal moeiliker vind, kan 3 - 4 weke aan dié module spandeer word.
  • ** Aktiwiteit 19 is ‘n taak vir die portefeulje. Die opdrag is baie eenvoudig, maar leerders moet in staat wees om dit netjies en akkuraat uit te voer. Leerders moet voor die tyd weet hoe opvoeders die taak gaan assesseer.

1.1

a) 11 8 size 12{ { { size 8{"11"} } over { size 8{8} } } } {} 1

b) 4 8 size 12{ { { size 8{4} } over { size 8{8} } } } {}

c) 16 8 size 12{ { { size 8{"16"} } over { size 8{8} } } } {}

d) 6 4 size 12{ { { size 8{6} } over { size 8{4} } } } {}

e) 6 8 size 12{ { { size 8{6} } over { size 8{8} } } } {}

1.2

a) 1 4 size 12{ { { size 8{1} } over { size 8{4} } } } {}

b) 6 8 size 12{ { { size 8{6} } over { size 8{8} } } } {}

c) 2 4 size 12{ { { size 8{2} } over { size 8{4} } } } {} 4 8 size 12{ { { size 8{4} } over { size 8{8} } } } {}

d) 5 4 size 12{ { { size 8{5} } over { size 8{4} } } } {}

e) 3 2 size 12{ { { size 8{3} } over { size 8{2} } } } {} 6 4 size 12{ { { size 8{6} } over { size 8{4} } } } {}

f) 14 8 size 12{ { { size 8{"14"} } over { size 8{8} } } } {}

g) 8 4 size 12{ { { size 8{8} } over { size 8{4} } } } {} 16 8 size 12{ { { size 8{"16"} } over { size 8{8} } } } {}

2. KOPKRAPPERS

2.1 6 12 size 12{ { { size 8{6} } over { size 8{"12"} } } } {}

2.2 12 15 size 12{ { { size 8{"12"} } over { size 8{"15"} } } } {}

2.3 6 7 size 12{ { { size 8{6} } over { size 8{7} } } } {}

2.4 8 9 size 12{ { { size 8{8} } over { size 8{9} } } } {}

2.5 5 10 size 12{ { { size 8{5} } over { size 8{"10"} } } } {}

3.

  • >

3.2<

  • =

3.4<

3.5 Maak eers noemers dieselfde

4.

5.

  • <

5.2>

5.3 Soek eers gemene noemer

6.

  • 63

6.2 20

  • 18

6.4 40

6.5 10

7.

7.1 2 5 size 12{ { { size 8{2} } over { size 8{5} } } } {}

7.2 4 9 size 12{ { { size 8{4} } over { size 8{9} } } } {}

7.3 4 7 size 12{ { { size 8{4} } over { size 8{7} } } } {}

Leerders afdeling

Inhoud

Aktiwiteit: om getalle te herken en te klassifiseer om hul sodoende te beskryf en te vergelyk [lu 1.3.3]

Ons het reeds in vorige grade gekyk na hoe breuke op ‘n getallelyn lyk. Wanneer hulle so mooi duidelik geplaas is soos op die getallelyn hieronder, is dit sommer kinderspeletjies om die breuke met mekaar te vergelyk en te bepaal watter is ekwivalent aan, groter of kleiner as ‘n gegewe breuk. Hieronder volg ‘n paar oefeninge om te kyk of jy jou kennis van ekwivalent breuke korrek kan toepas.

1. Kyk goed na die volgende diagram.

1.1 Skryf die ontbrekende breuke neer:

a) ………………………………………………..

b) ………………………………………………..

c) ………………………………………………..

d) ………………………………………………..

e) ………………………………………………..

1.2 Skryf ekwivalente breuke neer vir:

a) 2 8 size 12{ { {2} over {8} } } {} ………………………………………………..

b) 3 4 size 12{ { {3} over {4} } } {} ………………………………………………..

c) 1 2 size 12{ { {1} over {2} } } {} ………………………………………………..

d) 10 8 size 12{ { {"10"} over {8} } } {} ………………………………………………..

e) 12 8 size 12{ { {"12"} over {8} } } {} ………………………………………………..

f) 7 4 size 12{ { {7} over {4} } } {} ………………………………………………..

g) 4 2 size 12{ { {4} over {2} } } {} ………………………………………………..

3. Vul in:<;>of = :

3.1 5 6 size 12{ { {5} over {6} } } {} ............... 2 3 size 12{ { {2} over {3} } } {}

3.2 4 5 size 12{ { {4} over {5} } } {} ............... 9 10 size 12{ { {9} over {"10"} } } {}

3.3 7 9 size 12{ { {7} over {9} } } {} ............... 21 27 size 12{ { {"21"} over {"27"} } } {}

3.4 5 8 size 12{ { {5} over {8} } } {} ............... 21 32 size 12{ { {"21"} over {"32"} } } {}

3.5 Kan jy verduidelik hoe jy jou antwoorde gekry het?

4. Help “vang” die visse met ‘n waarde groter as 1 2 size 12{ { {1} over {2} } } {} deur hul netjies in te kleur.

5. Werk saam met ‘n maat en vul in:<;>of = :

5.1 3 4 size 12{ { {3} over {4} } } {} ............... 5 6 size 12{ { {5} over {6} } } {}

5.2 2 3 size 12{ { {2} over {3} } } {} ............... 3 5 size 12{ { {3} over {5} } } {}

5.3 Verduidelik aan die res van die klas hoe julle die antwoord gekry het.

6. Voltooi die volgende tabel:

BREUKE GEMENE NOEMER
Bv. 1 2 size 12{ { {1} over {2} } } {} , 1 3 size 12{ { {1} over {3} } } {} 6
6.1 1 9 size 12{ { {1} over {9} } } {} , 1 7 size 12{ { {1} over {7} } } {}
6.2 1 4 size 12{ { {1} over {4} } } {} , 1 5 size 12{ { {1} over {5} } } {}
6.3 1 6 size 12{ { {1} over {6} } } {} , 1 9 size 12{ { {1} over {9} } } {}
6.4 1 5 size 12{ { {1} over {5} } } {} , 1 8 size 12{ { {1} over {8} } } {}
6.5 1 2 size 12{ { {1} over {2} } } {} , 1 5 size 12{ { {1} over {5} } } {}

7. Omkring die kleinste breuk:

7.1 2 5 size 12{ { {2} over {5} } } {} , 3 6 size 12{ { {3} over {6} } } {}

7.2 3 8 size 12{ { {3} over {8} } } {} , 4 9 size 12{ { {4} over {9} } } {}

7.3 4 7 size 12{ { {4} over {7} } } {} , 3 4 size 12{ { {3} over {4} } } {}

Tyd vir selfassessering

Hoe het jy tot dusver gevaar? Is jy gereed vir die volgende afdeling van die werk? Wys vir ons deur jouself te assesseer op ‘n skaal van 1 – 4.

  1. = benodig aandag
  2. = redelik goed

3 = baie goed

4 = uitstekend

KRITERIA KODE
Ek kon die woorde by die korrekte verduideliking pas op bl. 3. 1 2 3 4
Ek kon no. 1 van Aktiwiteit 1.1 korrek beantwoord. 1 2 3 4
Ek kon die egte breuke vind by no. 3. (LU 1.3)
Ek kon die onegte breuke vind by no. 3. (LU 1.3) 1 2 3 4
Ek kon die gemengde getalle vind by no. 3. (LU 1.3) 1 2 3 4
Ek kon die tabel by no. 4 korrek voltooi. (LU 1.3) 1 2 3 4
Ek kon verduidelik wat ekwivalente breuke is. (LU 1.8) 1 2 3 4
Ek kon eie ekwivalente breuke vir 1 4 size 12{ { {1} over {4} } } {} korrek aandui by no. 2 van Aktiwiteit 1.2. (LU 1.8) 1 2 3 4
Ek kon ekwivalente breuke vir ander breuke ook neerskryf (bl. 6). 1 2 3 4
Ek kon verwantskapstekens korrek invul. 1 2 3 4

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 1.3: Dit is duidelik wanneer die leerder die volgende getalle voorstel en herken sodat dit beskryf en vergelyk kan word:

1.3.3 gewone breuke, insluitend spesifiek tiendes, honderdstes en persentasies.

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Source:  OpenStax, Wiskunde graad 6. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11072/1.1
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