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Mathematics

Measurement and time

Time

Educator section

Memorandum

1. 4 h 40 min + 24 h + 16 h 30 = 49 h 10 min

2. 45 min × 7 = 315 min = 5 h 15 min

3. 08:05

4. 81 + 365 + 366 + 365 + 365 + 365 + 360 + 52 + 2 325 days

5. 35 km in 20 min

× = 3 × 35 = 105 km/h

6. 2 × 110 km = 275 km

7.1 50 min

7.2 190 min = 3 h 10 min

7.3 Yes

7.4 10:00 and 13:15

7.5 18h00

Leaner section

Content

Activity: to solve problems involving time units [lo 4.2]

Work with a partner. Read each problem carefully and then solve it as neatly and accurately as possible.

1. Johan leaves on an excursion at 15:20 on Friday. He arrives back at home at 16:30 on Sunday. How long was he gone?

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2. Heleen practises on her violin for 45 min every day. For how many hours and minutes does she practise every week?

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3. An aeroplane departs for London at 19:40 and lands at Heathrow airport 12 h 25 min later. At what time does the plane land?

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4. If Marius was born on 11 October 1962 and John on 21 February 1969, how much older is Marius than John?

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5. If it takes me 20 min to cover 35 km at a constant speed, what is my speed? (km/h)

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6. Mr Voges travels at a constant speed of 110 km/h. How far will he drive in 2 h?

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7. Study the TV programme timetable for SABC3:

7.1 How much time in total is devoted to the news? ________________________

7.2 How much time is devoted to international business news?________________

7.3 Are there any educational programmes? ______________________________

7.4 At what times?___________________________________________________

7.4 For how long does SABC3 broadcast every day?________________________

ASSESSMENT BY EDUCATOR:

Circle the applicable code:

NUMBER CORRECT CODE
12 - 34 - 56 - 7 1234

Assessment

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

Assessment Standard 4.2: We know this when the solves problems involving calculations between appropriate time units, including time zones and differences.

Questions & Answers

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
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
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
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
how to synthesize TiO2 nanoparticles by chemical methods
Zubear
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit 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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