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Wiskunde

Graad 5

Meting en tyd

Module 40

Lengte

In hierdie leereenheid gaan ons kyk na verskillende eenhede om lengte mee te meet, asook na die belangrikheid daarvan om akkuraat te meet.

Aktiwiteit 1:

Om te meet en op te teken [lu 4.5.3]

Om met toepaslike meetinstrumente presies te meet [lu 4.7.3]

1. Kom ons spring sommer dadelik weg! Hoe goed ken jy jouself? Meet die volgende so akkuraat moontlik – ‘n maat mag jou help:

1.1 die lengte van jou duimnael

1.2 die lengte van jou pinkie

1.3 die lengte van jou regtervoet

1.4 die lengte van jou linkerarm van jou skouer tot by die punt van jou middelvinger

1.5 Hoe lank is jy?

1.6 Hoe hoog kan jy bykom as jy spring van die grond af?

1.7 Hoeveel hoër is dit as jyself?

2. Wat het jy gebruik om bogenoemde te meet?

3. Watter ander meetinstrumente kan ons nog gebruik om lengtes mee te meet?

Onthou jy nog?

1 cm = 10 mm

1 m = 100 cm

1 m = 1 000 mm

1 km = 1 000 m

Het jy geweet?

  • 1 meter is omtrent die afstand van ’n grootmens se neus tot by die punt van sy uitgestrekte hand se middelvinger.
  • 1 cm is ongeveer die lengte van ’n vingernael.
  • 10 cm is ongeveer die lengte van ’n hand.
  • 1 mm is min of meer die breedte van die spasie onder jou vingernael.
  • 10 mm is ongeveer die breedte van ’n pinkie.

4. Werk saam met ’n maat en voltooi die volgende tabel.

Meet Skatting Ware afmeting Verskil
a) die lengte van jou opvoeder
b) die breedte van jul klaskamer
c) die hoogte van jou bank / tafel
d) die totale lengte van die skryfbord in die klas

Aktiwiteit 2:

Om probleme op te los wat die kies van berekening met en herlei van standaard- eenhede insluit [lu 4.6]

1. Dit is belangrik dat ons sal weet watter meeteenhede vir spesifieke lengtes gebruik word. Om dit korrek te kan doen, is dit noodsaaklik dat ons sal weet presies hoe lank die verskillende meeteenhede is. Kom ons kyk hoe vaar jy! Kies ‘n geskikte eenheid om die volgende te meet:

1.1 Die borsmaat van Pa se pak klere is 102 ....................

1.2 Die hoogte van my kamermuur is 4 ....................

1.3 Die breedte van die stoep van die plaashuis is 2,5 ....................

1.4 Die dikte van my woordeboek is 40 ....................

1.5 Die afstand tussen Johannesburg en Kaapstad is meer as 1 000 ....................

1.6 Die diepte van die water in ons swembad is 1,500 ....................

2. Omkring die afmeting wat die naaste aan die werklikheid is:

2.1 Die deur van ons klas is ongeveer . . . . . . . . hoog.

(a) 20 m (b) 200 mm (c) 2 km (d) 2 m

2.2 My voet is omtrent . . . . . . . . lank.

(a) 26 cm (b) 26 mm (c) 26 km (d) 26 m

2.3 Die afstand van Durban na Oos-Londen is . . . . . . . . . . .

(a) 674 mm (b) 674 km (c) 674 m (d) 674 cm

3. Kom ons kyk na die desimale skryfwyse van lengte:

Ons weet reeds 10 mm = 1 cm

Dus: 25 mm = 10 + 10 + 5 mm

= 1cm + 1 cm + 5 mm

= 2 cm + 5 mm

= 2,5 cm of 2 1 2 size 12{ { { size 8{1} } over { size 8{2} } } } {} cm

Voltooi die tabel:

Aantal mm 10 85 ............ 245 ............ 1 026 ............
Aantal cm 1 ............ 4,2 ............ 17,9 ............ 146,3

4. Ons weet daar is 1 000 mm in 1 m

Dus: 2 347 mm = 2 m 347 mm

= 2,347 m

Voltooi die tabel:

mm m
4 328 4,328
..................... 3
367 .....................
..................... 4,7
28 .....................
..................... 0,067
6 .....................

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
ya I also want to know the raman spectra
Bhagvanji
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
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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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