hi everybody this is Misterduncan in England how are you today are you OK I
hope so are you happy I hope so
in today's lesson we are going to take a look at some things that we use in our
everyday life something that comes in very useful when we need to add up or
subtract or multiply in today's lesson we are going to talk all about numbers
the word number derives from the Latin 'numerus' and the numbers we use today
originated in Arabic form during the eighth century the original design of
the numbers was based on geometric shapes the amount of angles used in each
character showed the number value so number one has just one angle number two
has two angles number three has three angles and so on these Arabic characters
have changed very little over the years and are now used by everyone everywhere
there are many ways to express a number it can be expressed as a word as a
symbol as a figure a number represents a particular quantity or amount you count
using numbers calculations use numbers this is called mathematics or maths for
short in American English it is pronounced as math numbers express
quantity numbers express dimensions the height width length circumference and
even the appearance of an object can be expressed using numbers the weight of
something or the mass of an object is also expressed as a number there were
200 guests at the wedding party the tree is 10 meters tall the field is 100
meters wide the pole is 15 meters long the circle is 10 inches in diameter the
house has two doors and eight windows I weigh 11 stone time and distance are
also expressed using numbers how long something takes to occur and when it
occurs and how far away something is or the distance between one thing and
another can all be expressed using numbers
mathematics we use numbers to make calculations numbers can be added to
each other this is called addition we express this calculation as plus for
example 5 plus 4 the result is expressed as equals
so 5 plus 4 equals 9 we can take one number away from another
this is called subtraction we express this calculation as - for example 9 - 4
once again we use the word equals to express the result so 9 minus 4 equals 5
we can also multiply one number by another we call this multiplication the
symbol is expressed as x for example 5 times 9
once again we show the result by using equals so 5 times 9 equals 45 the
reverse can also be done by dividing numbers with each other this is called
division we use the divide symbol to show this for example 50 divided by 5 so
we express this as 50 divided by 5 equals 10 it is common to replace equals
with is when expressing a calculation we can say that 5 plus 4 is 9 all of these
calculations can be described as basic equations expressing large numbers in
English 100 is 10 times 10 1000 is 10 times 100 1 million is 1000 times 1000 1
billion is 1000 times 1 million 1 trillion is a million times a million
so if you were the richest person in the world with 90 billion dollars it would
take 8 and a half thousand years to count up to 90 billion that...
is mind-blowing
numbers are very useful for making lists you can make a list of items while
numbering them and writing down each item with its number next to it to
number something is an action when counted numbers always come in a certain
order this is called numerical order for example the order of numbers between
1 and 10 is always the same you can count up from 1 to 10
or you can count down from 10 to 1 expressing position with numbers is
often done as a way of announcing the results of a contest or competition
dates contained within each month are also expressed in this way let's have a
look at one month in particular August has 31 days and each day is numbered in
the following way...
a number can be described as a numeral a
digit a figure and a cipher people measure the progression of their
lifespan by using numbers to express their age we can work out how long it
will take to get from one place to another by using speed and distance once
again this is expressed in numerical form in your daily life numbers are
relevant to calculate your monthly salary you multiply the number of hours
you work with the rate you are paid per hour most home addresses have numbers in
them your house number your phone number your insurance number your passport
number your date of birth your lucky number your unlucky number your
lottery numbers it would appear that numbers figure in our day-to-day lives a
lot more than we realise
are you good at mathematics some people find maths difficult some people prefer
to make calculations by writing them down on paper while others are able to
do them in their head I hope you have enjoyed this lesson and if you have any
questions feel free to leave a comment below the video
this is mr. Duncan in the birthplace of the English language saying thanks for
watching me teaching you and of course until next time
ta ta for now 8-)