# 1.9 To recognise numbers and compare them to one another

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1.

1.1 8 366

1.2 7 452

1.3 8 664

1.4 9 548

2.

2.1 6 750

2.2 8 260

2.3 3 516

2.4 9 379

3.

3.1<

3.2<

3.3<

3.4<

1. 46

2. 26

3. 39 337

4. 5 000 I)

5. 4 072 j)

6. 4 440

7. 7 739

8. =

9. 14; 5

10. 1 000; 8

## To be able to calculate correctly [lo 1.8]

MORE OR LESS?

1. If you know where the tens and hundreds are in a number (place value) it is easy to add 10 or 100 (more than), or subtract 10 or 100 (less than). See whether you can write down the answer immediately! Which number is:

1.1 10 more than 8 356?_____________________________________________

1.2 10 less than 7 462? ______________________________________________

1.3 100 more than 8 564? ____________________________________________

1.4 100 less than 9 648? _____________________________________________

2. In this activity you must read the question carefully and compare your answer to the given number to ensure that you have worked correctly.

2.1 6 740 is 10 less than _____________________________________________

• 8 360 is 100 more than ____________________________________________

2.3 3 526 is 10 more than _____________________________________________

2.4 9 279 is 100 less than _____________________________________________

Note: "less than" now means that you must add to get the right answer, and "more than" means that you must subtract to calculate the answer!

COMPARING AND ARRANGING

## Do you remember this?

>means "larger than"

<means "smaller than"

= means "equal to" or "the same as"

3. We can use the mathematical symbols<;>and = when we compare answers. It is important that you calculate the answer correctly, or the symbol will be wrong! Now calculate the answer where necessary, compare the answer left of the é wit the one right of the é and then complete:<;>or =:

3.1 (5 × 6) + 9 * 41

3.2 8 921 * 9 821

3.3 2 356 * 2 000 + 500 + 30 + 6

3.4 4 000 + 200 + 50 + 7 * 4 275

FUN WITH THE POCKET CALCULATOR!

Work with a friend. You will need one pocket calculator.

• Player A types in any four-digit number on the pocket calculator, e.g. 4 986.
• Player B now "shoots down” any of the figures by means of subtraction, e.g. 4 986 − 80 = 4 906.
• Take turns to "shoot down” figures. The winner is the player who gets 0 on the display screen.

ASSESS YOURSELF BEFORE GOING FURTHER!

Complete the following by marking the applicable column only:

 Not at all Almost Good Excellent I am able to see the patterns in rows of numbers and to complete the number patterns (LO 2.1) I am able to arrange numbers from large to small and vice versa (LO 1.3) I am able to insert the signs that show relationship (>;<; = ) correctly (LO 1.3)

LET US SEE HOW YOU ARE COPING.

• Are you able to answer the following questions correctly?

1. How many hundreds are in 4 600?___________________________________

2. How many thousands are in 26 000? _________________________________

3. Encircle all the odd numbers in the following:

14 ; 39 ; 128 ; 337 ; 4 000

4. What is the value of the 5 in 5 713?__________________________________

5. Which number is represented in the following diagram?

6. Encircle the largest number:

4 040 ; 4 404 ; 4 440 ; 4 004

7. Which number is 100 more than 7 639?_______________________________

8. Fill in>;<of = :

40 + 200 + 3 000 + 6 ____________________ 3 246

9. Complete the pattern:

41 ; 32 ; 23 __________________ ; __________________

10. Complete:

2 386 = (2 × _________) + (3 × 100) + (_________ × 10) + (6 × 1)

## 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 1.3: We know this when the learner recognises and represents numbers in order to describe and compare them:

Assessment Standard 1.8: We know this when the learner estimates and calculates by selecting and using operations appropriate to solving problems.

#### Questions & Answers

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
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
anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
what does nano mean?
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?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
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
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
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
how did you get the value of 2000N.What calculations are needed to arrive at it
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