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Wiskunde

Graad 5

Gewone breuke en desimale breuke

Module 38

Tabelle en kontroles om data te organiseer

Aktiwiteit 1:

Om tabelle en kontroles te gebruik om data te organiseer en aan te teken [lu 5.3]

1. Gebruik nou jou bestaande kennis. Kyk goed na die volgende tabel en voltooi:

T E t h
Bv. 5 9 8 = 5 98 100 size 12{ { { size 8{"98"} } over { size 8{"100"} } } } {} = 5,98
1.1 3 6 = ............ = ............
1.2 1 7 = ............ = ............
1.3 3 6 = ............ = ............
1.4 4 2 8 5 = ............ = ............
1.5 4 7 0 3 = ............ = ............

Kopkrapper!

Hoe lyk die volgende breuke as desimale breuke op die sakrekenaar?

1. 3 100 size 12{ { {3} over {"100"} } } {}

2. 9 100 size 12{ { {9} over {"100"} } } {}

3. 40 100 size 12{ { {"40"} over {"100"} } } {}

4. 80 100 size 12{ { {"80"} over {"100"} } } {}

5. 37 100 size 12{ { {"37"} over {"100"} } } {}

6. 59 100 size 12{ { {"59"} over {"100"} } } {}

Hoe verskil 3 en 4 se antwoorde van die res?

Waarom is dit so?

Het jy geweet?

Ons skryf gewoonlik nie die eind nulle in desimale breuke nie, maar dit is belangrik om hulle wel in die volgende gevalle te skryf:

a) As ons met geld werk: R8,60 (dit wys hoeveel sent daar is)

b) As ons atlete se tyd neem met ’n stophorlosie : 7,30 sekondes. So gee ons uitslae tot ’n honderdste van ’n sekonde

  1. As Ma materiaal gaan koop: 1,70 meter (sodat die verskoopsper­soon presies weet hoeveel cm om af te sny)

Aktiwiteit 2:

Om getalle te herken en voor te stel [lu 1.3]

1. Soms is dit moeilik om te bepaal presies waar ‘n desimale getal in die groot geheel pas. n Getallelyn is ‘n handige hulpmiddel om jou hierin te help, want nou kan jy “sien” hoe die getalle op mekaar volg. Kyk of jy op die getallelyn kan aandui min of meer waar die volgende getalle sal lê:

A : 5,82

B : 5,99

C : 6,09

D : 6,24

Aktiwiteit 3:

Om ‘n reeks tegnieke te gebruik om hoofreken te doen [lu 1.10.2]

1. Kom ons speel ’n speletjie!

Werk saam met ’n maat. Maak beurte. Druk met die agterkant van jou potlood op enige getal terwyl jou oë toe is. Maak dan jou oë oop en sê waaruit dié getal bestaan,

bv. 14,38 = 14 + 3 10 size 12{ { {3} over {"10"} } } {} + 8 100 size 12{ { {8} over {"100"} } } {}

Alles wat jy reg het, moet jy groen inkleur, terwyl jou maat weer alles wat korrek is, blou inkleur. Die een wat iets verkeerd het, mis ’n beurt. Die een wat die meeste blokkies ingekleur het, wen.

Aktiwiteit 4:

Om getalle te herken en te klassifiseer ten einde hulle te vergelyk [lu 1.3.3]

1. Jy weet reeds hoe ons tiendes en honderdstes as desimale breuke skryf. Kyk nou baie goed na die volgende getalle. Vervang die * met<;>of =

Wenk: as jy twyfel oor die korrekte antwoord, breek die getalle eers op soos in die speletjie hierbo.

1.1: 1,7 * 1,07

1.2: 0,6 * 0,06

1.3: 0,58 * 0,9

1.4: 0,34 * 0,4

1.5: 2,05 * 2,5

1.6: 1,8 * 1,80

Kopkrapper!

Hoe lyk een kwart ( 1 4 size 12{ { { size 8{1} } over { size 8{4} } } } {} ) as ’n desimale breuk? .........................

Kan jy die volgende as desimale breuke skryf?

a) 3 4 size 12{ { {3} over {4} } } {} :

b) 1 25 size 12{ { {1} over {"25"} } } {} :

c) 3 20 size 12{ { {3} over {"20"} } } {} :

d) 17 50 size 12{ { {"17"} over {"50"} } } {} :

Aktiwiteit 5:

Om tabelle en kontroles te gebruik om data te organiseer en aan te teken [lu 5.3]

1. Uitdaging!

Neem ’n maatband en meet die lengte van vyf van jou klasmaats (tot twee syfers na die desimale komma). Lys jou resultate in ’n tabel en rangskik jou maats van die kortste tot die langste.

Naam Lengte Genommer :kort na lank
1.1
1.2
1.3
1.4
1.5

Duisendstes

Het jy geweet?

As ek een duisendste 1 1000 size 12{ { {1} over {"1000"} } } {} as ’n desimale breuk moet skryf, sal dit 0,001 wees.

Die nulle is plekhouers vir die ene, tiendes en honderdstes en mag nie weggelaat word nie.

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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