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Mathematics

Number concept, addition and subtraction

Educator section

Memorandum

1.1 24; 48; 64; 32; 120; 16; 96; 88

1.2 36; 18; 45; 81; 54; 63; 108;

1.3 36; 24; 48; 144; 60; 120; 96; 108;

2.1 27

2.2 68,5

2.3 10

2.4 6

2.5 +

2.6 54

2.7 7

2.8 300

2.9 300

2.10 984

2.11 8

2.12 43

2.13 112

2.14 72

2.15 134

2.16 4

2.17 132

2.18 84

2.19 3 600

2.20 7 000

3.1 10 000

3.2 10 000

3.3 10 000

3.4 10 000

4. 1 000; 10 000

5.

(i) twenty three thousand nine hundred and eighteen

(ii) forty seven thousand and seven

6.

6.1 A: 10 000

B: 12 500

C: 14 000

D: 16 500

E: 18 000

7.

7.1 10

7.2 100

7.3 1 000

7.4 60 000

7.5 100

7.6 10

7.7 36 567

7.8 16 824

7.9 3 612

7.10 10 000

Leaner section

Content

Activity: to represent, recognise and compare numbers [lo 1.3]

To be able to calculate correctly [lo 1.8]

To improve mental arithmetic skills [lo 1.9]

1. If you know your tables very well it is easy to multiply and divide, especially with greater numbers. Work with a friend. See how quickly you can catch the correct fishes that go with the multiplication tables, by colouring them in.

1.1 8× table - green

1.2 9× table - blue

1.3 12× table - yellow

2. Now let us see whether you can improve your mental arithmetic skills! Work on your own and complete the following mental arithmetic test as quickly and accurately as possible! (Note: in Mathematics brackets mean “do that bit first”).

2.1 14 + 9 + 4 = _________________

2.2 Halve 137: _________________

2.3 30 × _________________ = 3000

2.4 (42 ÷ _________________) + 9 = 16

2.5 567 _________________ 23 = 590

2.6 9 × 6 = _________________

2.7 _________________ × 8 = 56

2.8 _________________ - 15 = 285

2.9 80 + 65 + 155 = _________________

2.10 1 003 - 19 = _________________

2.11 72 ÷ 9 = _________________

2.12 (5 × 6) + 13 = _________________

2.13 108 ÷ _________________ = 8

2.14 _________________ ÷ 12 = 6

2.15 Double 67: _________________

2.16 (5 × _________________) - 9 = 11

2.17 11 × 12 = _________________

2.18 _________________ ÷ 7 = 12

2.19 Round off to the nearest 100: 3 550 _________________

2.20 Round off to the nearest 1 000: 7 299_________________

Colour in:

My previous mental arithmetic mark was: BETTER WORSE THE SAME

3. In this activity it is important to look at the value and place value of every digit. Work with a friend and see whether you can answer the following questions:

3.1 Which number is 1 more than 9 999? _________________________________

3.2 Which number is 10 more than 9 990?________________________________

3.3 Which number is 100 more than 9 900?_______________________________

3.4 Which number is 1 000 more than 9 000?______________________________

3.5 The number 10 000 is 10 more than __________________________________

4 Let's see if you were right!

TEN THOUSANDS

DO YOU REMEMBER?

10 units = 10 × 1 = 10

10 tens = 10 × 10 = 100

10 hundreds = 10 × 100 = 1 000

4. Complete the following:

10 thousands = 10 × ......................... = .........................

In the notation column it looks like this:

× 10 × 10 × 10 × 10
Ten thousands Thousands Hundreds Tens Units
TT T H T U
10 000 1 000 100 10 1
10 × 10 × 10 × 10 10 × 10 × 10 10 × 10 10 × 1 1 × 1
÷ 10 10 ÷ 10 ÷ 10

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
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
Google
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
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
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
Brian Reply
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?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
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 ?
Bob Reply
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?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Mathematics grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10994/1.3
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