Long Division Method Decimals - Square and Square Roots, Mathematics, CBSE Class 8 Video Lecture

hello friends this video on square and
square du parquet d2 is got to do by
example.com know how to your come exam
now this long division method can also
be used to find our square root of the
decimal number but there will be a very
slight difference with decimal numbers
so we will just put our main focus on
that difference and that difference will
be in the first step Wendy please bar
over the numbers so let us take some
examples of decimal numbers like thirty
one point three six let's say you have
to find out square root of 31 point
three six or you have to find square
root of 150 five point six one or you
have to find square root of six one six
three five point six one three so these
are some three varieties of decimal
numbers and you have to find their
square now I do not have a entire
process what I'll just show is how the
first step is different now in the first
step that is when you put the bar
normally what we do we start putting the
bias from the unit space so the units
click here also the jewels will remain
the same for the whole number part of
the decimal number because a decimal
number has the whole number part on left
hand side and the decimal part on the
right hand side like so in this T is
when you place by for this number so for
the whole number part you place it calm
down unit space like this for this
number your first ball will be here is
your second bar will be here for this
number your first bar will be here you
second bar would be chips
so cone number five the rule remains the
same but for the fractional part we
clean the bar starting from the digit
immediately after the decimal point to
the digit immediately after the street
so we start taking the bar from this
side so we put three six together
similarly here we put six one together
here we start putting the bar from this
line so we put six one together and then
we have three today is nothing off the
tree so what we don't replace to zero
and we put three zero together
whereas if you place a zero because we
know that after decimal point whether we
have a zero all we do not have all the
yoga do not make any difference so we
have just put a zero for our steady game
so that you know if we get to there as
much so the important tab here is that
in decimal numbers when you look at the
whole number part we start placing the
bar from right-hand sense that is from
unit place towards the set towards
technical side but for the decimal part
we start placing the bar from the digit
immediately after the decimal point so
we basically move - all right hand side
so that is the only difference between a
decimal number and of whole numbers with
regards to the long division method to
find square root so let us take one
example and to find the square root a
31-point see fit so as I said in the
first step replace the bar like this and
then again the same process let's find a
perfect square whose value is less than
or equal to 31 so that number would be 5
because 5 square is 25 so 5 into 5 is 25
so let's find that in my remainder you
may do to fix now what we do we bring
bring down the next numbers under the
bar to the next numbers are 36 but here
you have a decimal point before 36 so
what you do in the portions you put a
decimal point so that's the only thing
you have to do what about the division
you made that it is a slice of the
initial diseases that extend and you put
a blanket so what should be present in
this plant such that when we this is
multiplied with the same digit you get
something which is less than or equal to
6 terrific let's try if you put 1 then
101 it to 101 which is less than 6
pathetic if you put 2 then it is to 0 4
which is also less than 6 26 if you put
3 then it is 3 0 9 which is also less
than to 36 if you put forth then it is
416 which is also less than 36 if you
put files in is 525 which is less than 6
36 if you could take their latest six 36
which is equal to 6 terrific so this is
what we were looking for so we put six
years click here you get fixed 36 so
there whose square root of 31 point
three six is equal to five point six
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