<< Chapter < Page Chapter >> Page >

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

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Wiskunde graad 5. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10993/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Wiskunde graad 5' conversation and receive update notifications?

Ask