# 1.23 To determine the equivalence and validity of different

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## Memorandum

2. Learner’s own method

3.1 9 080 717

3.2 8 301 883

• 6 485 185

1. 4 2. 1

3 2

1 3

2 3

1 44

8 1

## To use strategies to check solutions [lo 1.11]

1. In the previous activity you had the opportunity to use your own strategies to solve problems. From the feedback in the class you would have realised that there are many ways of adding numbers.

Work in pairs. Discuss the following methods of adding and explain to each other how the answers are calculated:

## Let’s revise!

1.1 845 908 + 25 876 + 343 621

 800 000 + 40 000 + 5 000 + 900 + 0 + 8 20 000 + 5 000 + 800 + 70 + 6 + 300 000 + 40 000 + 3 000 + 600 + 20 + 1 1 100 000 + 100 000 + 13 000 + 2 300 + 90 + 15

= 1 000 000 + (100 000 + 100 000) + 10 000 + (3 000 + 5 000) + 300 + (90 + 10) + 5

= 1 215 405

1.2

= 1 215 405

1.3

 1 1 1 2 1 8 4 5 9 0 8 2 5 8 7 6 + 3 4 3 6 2 1 1 2 1 5 4 0 5

2. Can you show your friend any other method of calculation?

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3. Use any method of your choice (without a calculator) and calculate the sum of:

3.1 4 623 577 + 1 239 246 + 3 217 894

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3.2 2 851 416 + 4 981 235 + 469 232

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3.3 2 153 892 + 264 058 + 4 067 235

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## Brain teasers!

Complete the missing numbers:

1.

 1. 2 1 3 4 1 ___ 2. ___ 7 9 1 2 3 8 9 2 ___ 7 4 ___ 2 8 1 6 1 7 5 ___ 9 2 1 1 ___ 2 3 3 ___ 1 4 1 1 9 1 0 0 ___ 7 1 + 1 ___ 9 1 2 3 + 1 4 3 0 ___ ___ ___ 1 ___ 0 8 5 9 5 8 5 8 7

## Time for self-assessment

• Tick the appropriate rectangle:
 Yes Mostly Some-times No I can investigate adding methods and evaluate them (determine whether they are correct). (LO 1.11 en LO 2.6) * I can add correctly without a calculator. (LU 1.8) * I need more exercise in addition. *

* Ask your educator to explain again and give you extra exercises.

## 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 1.11: We know this when the learner uses a range of strategies to check solutions and judge the reasonableness of solutions.

Learning Outcome 2: The learner will be able to recognise, describe and represent patterns and relationships, as well as to solve problems using algebraic language and skills.

Assessment Standard 2.6: We know this when the learner determines, through discussion and comparison, the equivalence of different descriptions of the same relationship or rule presented:

2.6.3: e.g. number sentences.

where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
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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