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Graad 4

Meting, ruimte en vorms (meetkunde)

Module 10

Leer om tyd vanaf analooghorlosies te lees en te sê

Aktiwiteit 1:

Om te leer om tyd vanaf analoog-horlosies te lees, te sê en te skryf [LU 4.1]

Om meetinstrumente vir tyd, insluitend horlosies, te gebruik [LU 4.3]


  • Ons weet dat daar 365 1 4 size 12{"365" { {1} over {4} } } {} . dae in 'n jaar is. Vir die berekeninge in hierdie module mag julle egter 365 dae vir 'n gewone jaar en 366 dae vir 'n skrikkeljaar gebruik. 'n skrikkeljaar kom al om die vier jaar voor (4 kwart dae = 1 hele dag). Julle kan 'n skrikkeljaar uitken deur die laaste twee syfers van die jaartal deur 4 te deel. As daar nie 'n res oorbly nie, is daardie jaar 'n skrikkeljaar. Die jaar 2004 was 'n skrikkeljaar. Die ekstra dag word altyd by Februarie bygereken.

Daar is 24 ure in een dag. Daar is 7 dae in 'n week

Daar is 60 minute in 'n uur. Daar is 12 maande in 'n jaar

Daar is 60 sekondes in 'n minuut.


jaar = a

dag = d

uur = h

minute = min. (onthou dat: m = meters!)

sekondes = s

maand = md

week = w

Ons sal ook van tiendes en honderdstes van 'n sekonde in hierdie module te hore kom!

Analoog-horlosies toon slegs 12 ure. Hulle toon nie aan of dit oggend of middag is nie.

Die lang wyser beweeg elke uur reg rondom die sirkel. Dit dui die minute aan.

Die kort wyser neem twaalf ure om een keer om die sirkel te beweeg. Dit wys vir ons watter uur dit is.

  1. Skryf die tyd wat deur elke horlosie aangedui word:





Op die volgende bladsy is twee sirkels. Knip die eerste een uit. Vou dit in die helfte. Vou dit oop en kleur een helfte in. Skryf OOR by die regterkantste helfte en VOOR by die helfte aan die linkerkant. Plak nou jou uitgeknipte sirkel hier onder.


Wanneer ons die minute lees, toon die eerste helfte (die een aan die linkerkant) die minute voor die wyser by die uur kom. Wanneer die lang minuutwyser op pad is na halfpad om die sirkel, sê ons dit wys minute oor die uur totdat dit klaar deur die halwe sirkel beweeg het. Nadat die lang minuutwyser halfpad om die sirkel gekom het, sê ons dit wys minute voor die volgende uur .

Knip nou die tweede sirkel op die “uitknip”-blad uit. Vou dit in die helfte en dan weer in die helfte. Vou dit oop en teken stippellyne al langs die voue. Nou het ons die uur in 4 kwarte verdeel. Dus kry ons nou 'n kwart oor die uur en 'n kwart voor die volgende uur. Skryf KWART OOR aan die regterkant en KWART VOOR aan die linkerkant en plak die uitgeknipte sirkel bo-op die sirkel hier onder.


O m uit te knip

Lees die aanwysings aandagtig; maak seker dat jy elke stap verstaan voordat jy dit uitvoer.

Ons gaan nou die ure op die horlosie se wyserplaat skryf. Op die volgende bladsy sal jy nog twee sirkels kry om uit te knip. Knip die eerste een uit. Vou dit in die helfte. Vou dit weer in die helfte. Jy moet dit nie oopvou nie. Maak nou twee voue op die kwart wat jy deur die vouwerk geskep het, sodat dit in drie gevou is en soos 'n roomyshorinkie lyk. Kan jy voorspel hoeveel dele daar sal wees wanneer jy dit oopvou? Maak 'n merkie aan die kant van die sirkel by elke vou en skryf die nommer van die uur by die merkie. (Die eerste een word aangedui.) Plak die sirkel op die een op hierdie blad.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
I'm not good at math so would you help me
what is the problem that i will help you to self with?
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11100/1.1
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