Examples: Addition of decimals Video Lecture - Class 6

hello friends this video on decimals
part 16 is brought to you by exam for
calm no more fear from exam this
question time will quickly solve some
questions question number one
Rodriquez mother gave four rupees 10.50
and her father gave her rupees fifteen
point eight zero find the total amount
given to Radhika by the parents okay so
how much did the mother give the mother
gave hard rupees ten point five zero how
much did the father give the father gave
her rupees fifteen point eight zero so
how much is the total all we need to do
is we need to add these two numbers so
see if we have strategy please do the
two numbers in such a way that the
decimal points lie below each other so
now we just add it column wise and we
start with the rightmost column so 0
plus 0 is 0 5 plus 8 there's 13 so this
is 3 and one is going forward
so here 5 plus 0 would be 5 but we have
this plus 1 so it becomes 6 1 plus 1 is
2 so this becomes rupees 20 6.30 please
do not forget to put the decimal point
because if you do not put the decimal
point it becomes 2630 but with the
decimal point it is rupees 20 6.30 and
there is a huge difference between these
two numbers so it is very important that
we put the decimal point correctly below
the decimal point of the two numbers
fine so now we know that Radhika has a
total amount of rupees 20 6.30 let's
move on to the next question
it says nourish walked 2 kilometers 35
meters in the morning and one kilometer
7 meters in the evening how much
distance did he walk in all okay so he's
going for a morning walk as well as an
evening walk so during the morning he is
covering a distance of 2 kilometers 35
meters now whenever you come across the
situation where you know one particular
quantity is given in two different units
for example here the distance is given
in given partly in kilometers and partly
in meters so it is always best to
convert it into one unit so that you
know your job becomes easier so let's
convert this distance into kilometers so
how can we do that so 200 kilometres
plus 35 meters so 35 meters to
kilometers will be divided by 1,000 so
35 divided by 1,000 that is 2 plus 0.03
5 that is 2 point 0 3 5 kilometers so
this much kilometer he covers in the
morning and what about evening so during
evening he covers 1 kilometre 7 meters
so that is equal to 1 plus 7 by 1,000 so
that is equal to 1 plus point zero zero
7 which is equal to one point zero zero
seven kilometers so now we have both the
distances in kilometers so now what
would be the total distance covered that
is nothing but morning plus evening so
let's add these two two point zero three
five one point zero zero seven let's add
qalam wires from light 5 plus 7 is 12 so
you have one carry forward 3 plus zero
is three plus 1 that is 4 0 plus 0 is 0
2 plus 1 is 3 so this is three point
zero four two kilometers so this is the
total distance that he covers both
morning and evening question number
three sunita traveled 15 kilometer 268
meters by bus 7 kilometers 7 meters by
car and 500 meters on food in order to
reach her school how far is her school
from her residence so in order to find
out the distance of school from
residence we will have to add all of
these distance because what happens is
let's say this is her home so she starts
from home she travels some part of the
distance by bus again she travels some
part of the distance by car and then she
travels some part of the distance by
food and that's how she reaches
so that means the total distance covered
by bus car and food will give us the
distance between the school and the home
right select so before that what we will
do is the total distance traveled by bus
is 15 kilometers to 68 meters let us
convert it into kilometer so this would
be 15 plus 268 divided by 1,000 because
one meter is equal to that's because one
meter is equal to one by one thousand
kilometers now 15 this becomes 15 plus
0.26 8 that is equal to fifteen point
two six eight kilometers similarly
distance covered by car is seven
kilometer seven meter that is equal to 7
plus 7 by 1000 that is equal to 7 plus
zero point zero zero seven which is
equal to seven point zero zero seven
kilometers and how much did she cover by
foot she covered five hundred meters
that is five hundred divided by 1000
which is equal to 0.5 kilometers so now
we have all the distances covered in
kilometers so let us add all of them to
find out the total distance between
school and residents so this would be 15
point two six eight seven point zero
zero seven so let's write the decimal
point first before decimal you are seven
after decimal you had zero zero seven
again zero point five so before decimal
you have zero after decimal you have fun
now all these blank spaces you can put
zero now let's add these so eight plus
seven is fifteen so you have a one
carry-forward six plus 0 plus 0 is 6
plus one carry forward so it is 7 5 plus
2 is 7 then have decimal point seven
plus five again is 12 and we have
carry forward so one plus this carry
forward one it becomes two so the total
distance between home and residence
between school and home is twenty two
point seven seven five kilometers thank
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