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Mathematics

Number concept

Educator section

Memorandum

1.1 12 November 2001

5 November 2001

1.2 R94,98

1.3 10

1.4 14%

14%

1.5 maps

Cash

1.6 Anneke

1.7 R25,00

1.8 820:14

15:30

  • Cashier 101
  • No payment

2. R9 + R12 + R9 + R4 + R2 + R4 = R40

3.1 1 litre full cream milk

  • kg chicken pieces
  • litre Coke

410 g Surf maid peas

200 g Niknaks

5 litre Vanilla ice cream

1 Sasko Sam bread

3.2 Prices will vary from shop to shop

3.3 Calculate according to prices in 3.2

3.4 Calculate according to prices in 3.3

Leaner section

Content

Activity: to solve problems in context [lo 1.6.1]

When we buy something in a shop we receive a cash slip. We need to be able to understand and “read” the slip. If not, we will not be able to check if it really reflects what we have bought and paid for. Look at the following examples:

1. Study the above examples and then answer the following questions:

1.1 When were the purchases made at

Pick ’n Pay? ____________________________________________________

Ranch Meat Centre? _____________________________________________

1.2 What does the biltong cost per kg? __________________________________

1.3 How many items were bought from Pick ’n Pay? _______________________

1.4 What % tax had to be paid at

Pick ’n Pay? ____________________________________________________

Ranch Meat Centre? _____________________________________________

1.5 How (with what) did the client pay at

Pick ’n Pay? ___________________________________________________

Ranch Meat Centre? _____________________________________________

1.6 Who was the cashier at Ranch Meat Centre? __________________________

1.7 What amount did the customer give her? _____________________________

1.8 At what time were the purchases made at

Pick ’n Pay? ____________________________________________________

Ranch Meat Centre? _____________________________________________

1.9 If your purchases are not according to the slip, how will you know which cashier helped you at Pick a Pay if you cannot remember what he/she looked like?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.10 What does the * next to a few of the amounts on the Pick ’n Pay slip mean?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Do you still remember?

Explain to a friend how we round off to the nearest 10, 100 and 1 000.

** Can you explain how we would round off to the nearest 10 000?

2. When we go shopping, we can estimate to the nearest rand whether we will have enough money to pay.

Look at the following slip. Round off to the nearest rand and estimate how much you will have to pay for your shopping.

LAMB
0.360 Kg @ R25.98 / Kg
R9.35 _____________
LAMB
0.444 Kg @ R25.98 / Kg
R11.54 _____________
SWEET CORN R8.79 _____________
SQUASH
1.295 Kg @ R3.29 / Kg
R4.26 _____________
SWEET POTATOES
0.686 Kg @ R2.99 / Kg
R2.05 _____________
GOOD MORNING H R3.79 _____________
COOKED HAM
0.288 Kg @ R44.95 / Kg
R12.95 _____________

3. Confused Cathy’s shopping list is completely wrong!

3.1 Write the shopping list down correctly.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

3.2 Find out what each item will cost at your nearest supermarket and write it down.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

3.3 Use your calculator and calculate what this shopping will cost you.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

3.4 If you pay with a R100 note, how much change will you get?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Do you still remember?

Your calculator has a memory that you can use to do calculations with more than

one operation correctly.

M+ : enables the calculator to save or memorise the answer

MR / RCM : these keys are pressed if you want to retrieve the memorised answers

e.g. (347 219 + 34 987) + (296 553 + 1 897 320)

Key in 347 219 + 34 987 = M+

Then key in 296 553 + 1 897 320 = M+

Then key in MR or RCM

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 1.6: We know this when the learner solves problems in context including contexts that may be used to build awareness of other Learning Areas, as well as human rights, social, economic and environmental issues such as:

1.6.1: financial (including buying and selling, profit and loss, simple budgets, reading and interpreting accounts, and discount).

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
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Source:  OpenStax, Mathematics grade 6. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11030/1.1
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