# 3.5 Scale drawings  (Page 2/2)

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It might help them to draw the diagrams.

The decision to make use of carried numbers is left to the educator.

First supply paper shapes for dividing into tens, so that the learners may discover for themselves that tenths , like thirds and fifths, have to be calculated and measured. It is not simply a matter of folding and folding again as in the case of a ½ and a ¼ .

Guide them to discover that they, by first obtaining fifths , can divide each fifth down the middle to obtain tenths .

Discuss symmetrical shapes with the learners. Let them identify symmetrical objects in the classroom. They should complete the drawing after this exercise.

## Activity: scale drawings [l0 1.8, l0 4.5, l0 5.5 ]

Bonny and Tommy enjoyed watching the elephants most of all. There were large ones and small ones.

• Which trunk is the longest? ________________________________________
• Which trunk is the shortest? ________________________________________
• What can you deduce from this? ____________________________________

Each of the spaces between * and * on the number line represents 20 cm. Use any method to calculate the length of each trunk:

Some animals eat meat . They are carnivores .

Others eat plants and they are herbivores .

The carnivores together eat 100 kg of meat every day.

• Complete:
 Days: 1 2 3 4 Kg: 100
• Their meat is packed in 50 kg packets. How many packets of meat could the keeper make from 400 kg of meat?

He could _____________________________________________________________

This is enough meat for _____________________________________________ days.

• There are 4 cages with birds. They eat 1 kg of seed every day.

How many 250g containers will this make? (Draw the 250g containers.)

• The people at the zoo bought 5 packets of seed weighing 20 kg each. This is enough seed for _________________ days.
• Draw all the 20 kg packets of seed that are needed for 1 year.
• This is how much drinking water is placed in the monkeys’ cages every day:
• Draw the 1ℓ containers that can be filled from this.
• Draw the 500 mℓ containers that can be filled from this.
• Use your own method to do the calculations.

The small antelope drinks 125 mℓ of milk at a time. He gets milk 4 times per day. How much milk does he drink altogether?

It drinks _____________________________________________________________

• There are 69ℓ of water that have to be taken to 3 lion cages. How many litres of water can be taken to each cage?

Each cage ____________________________________________________________

• One of the monkeys is ill and the vet has said that it must be given 20 mℓ of medicine in the morning and in the evening. How many teaspoonfuls will it drink in a day? Remember: 1 t = 5 mℓ

It will drink ___________________________________________________________

## Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.8: We know this when the learner can perform calculations, using appropriate symbols, to solve problems;

Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.

Assessment Standard 4.5: We know this when the learner estimates, measures, compares and orders three-dimensional objects using non-standard and standard measures;

Learning Outcome 5: The learner will be able to collect, summarise, display and critically analyse data in order to draw conclusions and make predictions, and to interpret and determine chance variation.

Assessment Standard 5.5: We know this when the learner reads and interprets data presented in simple tables and lists.

where we get a research paper on Nano chemistry....?
what are the products of Nano chemistry?
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
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
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
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?
what is a peer
What is meant by 'nano scale'?
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 ?
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?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
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
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