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Mathematics

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Educator section

Memorandum

Leaner section

Content

Activity: to determine the equivalence and validity of a variety of representations [lo 2.6.3]

To use a variety of strategies to check solutions [lo 1.11]

Activity 2.7 has shown that there are different methods for calculating a quotient. Work through the different solutions to the following problem (with a partner):

How many people together would have the same amount of teeth as one of these dinosaurs?

1. I must divide 2 400 by 28.

I estimate 28 goes into 2 400

about 50 times.

I know 28 x 100 = 2 800

Thus: 28 x 50 = 1 400

And 28 x 25 = 700

The answer is thus 50 + 25 + 10 = 85 people. 20 teeth are left over.

2. I must calculate 2 400 ÷ 28 in this way:

There are thus 85 people, because there are 8 teeth too few for another person.

3. Can you solve the problem in any other way without using a calculator?

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Assessment

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: by number sentences.

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.

Questions & Answers

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Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
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Chris Reply
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Damian Reply
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Cied
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abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
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Porter
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Yasmin
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Cesar
I'm interested in nanotube
Uday
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Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
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Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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Prasenjit Reply
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Ali Reply
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bamidele Reply
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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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