Examples(NCERT): Word Problems related to Larger Number 1 Video Lecture - Class 6

hello friends this video on
understanding numbers part 10 is brought
to you by exam fee or comm no more fear
from exam so let us solve some questions
in order to understand this units
conversion better let's take a real-life
example the distance between the school
and the house of a students student is
one kilometer 875 meters every day she
walks both ways find the total distance
covered by her in six days okay so let
us first talk about the distance what is
the distance between the school and the
house the distance is equal to one
kilometer
875 meters now since we have I mean the
distance is being given in two different
units kilometre meter so it will be
convenient if we convert this into one
unit right so let us try to convert this
entire thing into one unit let's say we
convert it to meters so that means I
want to convert this part into meters so
what I am trying to do and trying to
convert kilometers into meters so let's
quickly remember the list or the order
of the units and the order was milli
saintly deci meter deca hecto hello now
what am I trying to do I am trying to
convert from kilo meter 2 meter so
basically I am moving up so moving up
means multiplying x what x 1 followed by
how many zeros how many steps I am i
jumping 1 2 3 so this needs to be
multiplied by thousand so basically one
kilometer will be equal to 1 into 1,000
meters so that is the conversion of 1
kilometer
plus you also have this 875 meters so
this 875 meter
we'll get added to this so 1000 meters
plus 1 plus 875 meters would be 1 8 7 5
meters so this would be the distance
between the house and the school in B
terms so now we have their diet distance
in meters now every nail the girl walks
both ways that means why going she walks
1 8 7 5 meters while coming back also
she walks 1 8 7 5 meters so that means
both ways would mean how much distance
is she covering in one day 2 into 1 8 7
5 meters that is basically 3 7 5 0 meter
so this is the distance that she is
covering in one day one day by going and
coming back now we have to find out how
much distance she covers in 6 days so
therefore in 6 days this would be 6
times that means 6 multiplied by 3 7 5 0
meters which will basically be 0 0 5 22
so this would be 2 2 5 0 0 meters now if
I ask you to convert this meter into
kilometer again what will you do so now
I am asking you to convert from meter to
kilometer so you are coming downwards so
you will divide divide by what 1 2 3 3
steps so 3 2 zeroes so divided by
thousand so when you divide this by
thousand so what happens you get twenty
two point five kilo meters so this is
the total this distance that she covers
in 60 s is twenty two point five
kilometers or twenty two thousand five
hundred meters so this is an example
where we made use of units now why did
we use units like kilometers because you
see when you
ten kilometer the number becomes smaller
when you write it in meters the number
becomes bigger and that is the use of
having so many different units so anyway
we want to represent something which is
very big we make use of a bigger unit
and smaller number because it is
convenient to write smaller numbers now
based on this we will solve some more
problems which involves bigger numbers
and which also involves different units
so that we get to know that how exactly
do we add subtract multiply larger
numbers square number one keep the
bookstore sold books worth rupees 2 lakh
85 thousand age 91 in the first week of
June and the books worth rupees 4 lakhs
768 in the second week of the month how
much was the same for the two weeks
together so this is for first week this
is for second week so for two weeks
together what would be the total sale so
of course the total sale would be the
same in first week plus the sale in
second week that is going to be the
total sale so the first week sale is 2
lakh 85,000 891 and the second week sale
is for lab 768 so we will add up the
sales for the first week and the second
week so this is how we will add up now
it is very important that we place the
two numbers correctly latch should be
with laughs the thousand should be in
the thousands please
again the 100 stands and unit should be
in their places accordingly so now we
find the sum eight plus nine will be a
eight plus man would be 9 9 plus 6 would
be 15 you have a caddy forward of 1
again this would be 6 this would be 8 6
this would is 6 so rupees 6 lakhs 86,000
659 would be the
see for the two weeks together now the
second part of the question says that in
which week was the sale greater and by
how much
now looking at these two numbers you
have to decide which is a greater number
so this is 2 lakhs this is 4 lakhs so
which one is greater of course 4 lakhs
so the sale in the second week was
greater and by how much now to find out
how much was this sale is greater than
this one we will have to find the
difference so basically we will have to
subtract the first week sale from the
second week sale so when you subtract
this what you get is 1 lakh 14,000 877
so the week so the second week sale was
greater than the first week sale by
rupees one lakh fourteen thousand eight
hundred seventy seven thank you
please visit exam fee or come for free
quality education you can learn with a
simple four-step learning process
wherein you can watch video lessons you
can ask your questions you can refer
notes and you can take a free online
test we have content for class six to
twelve on physics chemistry mathematics
and biology along with practical videos
so please subscribe to our channel for
daily updates thank you