BÀI 1
Stary! There is a gift
for you on the table.
Let’s open the wrapper
and see what the gift is.
wow, it’s a clock.
Such a colorful clock.
Look Stary! This is
the face of clock.
The face of clock
shows number 1 to 12.
Just like our hands.
The clock has 2 hands.
One hand is small and
the other is big.
The small hand is
called the hour hand.
The big hand is called
the minute hand.
Both the hands, that
is the hour hand and minute hand move in this direction only.
BÀI 2
Stary you have such a beautiful
clock in your hand.
But why you look so sad.
Don’t you know how to tell the
time?
Oh, don’t worry. I will teach you.
Telling the time when the minute
hand is on 12.
Stary, look at your clock.
The minute hand is the big hand
and the hour hand is the small hand.
the minute hand is on 12 and the
hour hand is on 2.
So the time is 2 o’clock.
Now the minute hand is on 12 and
the hour hand is on 6.
So the time is 6 o’clock.
Here the minute hand is on 12 but
the hour hand is on 8,
so Stary the time now is 8
o’clock.
Let us do an interesting activity.
Look at the clock and write the
time in the box
The time shows in the first clock
is 3 o’clock.
The time shows in the second clock
is 5 o’clock.
The time shows in the third clock
is 7 o’clock.
The time shows in the fourth clock
is 10 o’clock.
Telling the time when the minute
hand is on 3.
Now let us learn how to tell the
time when the minute hand is on 3.
In this clock the minute hand is
on 3 and the hour hand has passed 1.
So we say that the time is a
quarter past 1.
And in this clock the minute hand
is on 3 but the hour hand has passed 6.
The time is a quarter past 6.
Here is another clock Stary.
The minute hand is on 3 but the
hour hand has passed 8.
So the time is a quarter past 8.
Now, let us revision what we have
learnt.
Look at the clock and write the
time
The first clock shows a quarter
past 11
The second clock shows a quarter
past 12.
The third clock shows a quarter
past 5.
The fourth clock shows a quarter
past 9
Good! now match the time with the
clock.
The first clock shows a quarter
past 2
The second clock shows a quarter
past 10
The third clock shows a quarter
past 7
The fourth clock shows a quarter
past 3
Revision
Let us revise how to tell the time
when the minute hand is on 12 and when it is on 3.
Stary, write the time I showed by
the clock.
2 o’clock, 8 o’clock, quarter past
6, quarter past 9.
Good, Stary! You have done a great
job.
Now we learn how to tell the time
when the minute hand is on 6
.
Look at the clock, Stary.
Here the minute hand is on 6 and
the hour hand is between 2 and 3.
So we say that the time is haft
past 2
Now, let us keep the minute hand
on 6 and the hour hand is between 6 and 7.
Now the time is haft past 6.
Oh, stary! Now you have kept the
minute hand is on 6 hour hand is between 10 and 11.
So the time is haft past 10.
Let us do an activity.
Let us do an activity.
Look at the clock and write the
time.
The first clock shows haft past 8.
The second clock shows haft past 5
The third clock shows haft past
12.
The fourth clock shows haft past
9.
Now, let us do something
interesting.
The cartoon Cyril begins at haft
past 4
The cartoon Cyril ends at haft
past 5
Children went out to play at haft
past 3
Children returned from play at
haft past 7.
Revision
Stary, come on, let us revise
telling the time.
Write the time as shown by the
clock.
Quarter past 4
Haft past 11
9 o’clock
Very good, Stary!
Now let us teach you how to read
the time when the minute hand is on 9.
Telling the time when the minute
hand is on nine.
Look at the clock, the minute hand
is on 9 and the hour hand is between 12 and 1, but closer to 1.
The time is a quarter to 1.
Now the minute hand is on 9. And
the hour hand is between 5 and 6.
So the time is a quarter to 6.
Look at the clock now.
Here again the minute hand is on 9
but the hour hand is between 11 and 12.
So the time is a quarter to 12.
Let us now revise what we have
learnt.
Look at the clock and write the
time.
The time on the first clock is a
quarter to 8.
The time on the second clock is a
quarter to 3.
The time on the third clock is a
quarter to 12.
The time on the fourth clock is a
quarter to 1.
BÀI 3
Stary I don’t believe this. You
are still fast asleep.
Oh I understand, you have learnt
to read the calendar and you know it’s a holiday.
But Stary, it’s a bright sunny day
so wake up and I teach you something more about months of the year.
The months of the year can be
followed either from Gregorian year or from India solar year.
But today I will teach you about
the Gregorian year.
The first month of the Gregorian
years is January. It has 31 days.
Next term is February with 28-29
days.
March is the third month of the
year with 31 days.
The fourth month of the year is
April with 30 days.
Then come May, the fifth month
with 31 days.
Follow it by June, the sixth month
with 30 days.
Now, July has 31 days.
August comes next, the eighth
month with 31 days.
The ninth month of the year is
September with 30 days.
October is then month with 31
days.
The 11th month of the year is
November, with 30 days.
And Stary the last month of the
year twelfth month is December with 31 days.
Now Stary you look confuse. You
are wondering how do we remember with the month has 30 days and which has 31 days?
Don’t worry I have a simple form
just for you. Repeat it with me and it will help you know the number of the
days in each month.
30 day has September, April, June
and November.
All the rest has 31 days.
Except February is alone which has
28 days clear and 29 in a leap year.
Now let us revise what we have
studied:
- November has _____days.
- The 8th month of the Gregorian
year is ______.
-The month that comes after April
is _____.
- The 3rd month of the Gregorian
year has _____ days.
- The month of the Gregorian year
that have 31 days are ________________.
- The only month that has 28 days
is ________.
Now what is that easy Stary . I’m
happy. You have learnt the months of the Gregorian year .
BÀI 4
Stary! Why are you awake so early
today?
Oh! You thought it’s a school day.
It's weekend Stary and you have a
holiday.
You are upset on you? You didn’t
know? But don’t you have a calendar which you.
A calendar does use what day of
the month is it and the month of the year too.
What’s the problem? I understand.
You don’t know how to read it.
Don’t worry, today we will learn
how to read a calendar.
Here is a calendar.
Stary, which month of the year
does it show you?
Right! It’s the month of August
and the year is 2010.
Can you count the number of
Saturday in this month Stary?
Yes, There are 4 Saturday in
August.
Support I told you today was the
8th of August.
What day of the week would it be?
Exactly Stary the 8th of August is
a Sunday and you have a holiday today.
Can you tell me what is the date
in the third Wednesday of the month.
The third Wednesday of the month
is the 18th . That is really fast Stary.
- And which is the day occurs 5
times in the month of August?
Sunday, Monday and Tuesday occur 5
times in the month of August.
- Stary, do you know what date
does Sunday come?
Sunday come on the 1st, 8th, 15th,
22nd, 29th of the month.
- And this year Stary on which day
does the independent day fall?
Yes Independent day falls on
Sunday.
Now, that you have understood the
calendar. Let us revise what we have learnt.
Looking at the calendar answer
these questions. Let’s begin.
- The day on the first Saturday of
the month is ___________.
- The 31st of the month is
___________.
- There are _________ Wednesday in
August.
- The month of August has
___________days.
- The day on which Thursday come
are __________.
Excellent Stary , Are you
happy?
Now you can sleep late on the
holiday.
BÀI 5
Hey Stary! Look at what are the
father and son doing?
Uh, they want to measure how long
the pace of ribbon is.
Look at how are they measuring
Stary?
They are using the span of their
hand.
This is called a hand span.
Stary look! When the boy measures
the length of the string it comes to eight hand-spans.
Whereas when the father measures
it the length of the string is 5 hand- spans.
But it is the same
string.
So tell me why is there the
different in this length?
The father and the son has
different hand- span.
The father’s hands- pan is bigger
than the son.
Now look at! What they have in
their hands.
Oh! They are using a tape
measuring on the same job.
Hey, look Stary!
Now both the tape measures show
the same length. That is 120cm
Stary! We can also use a scale for
the same purpose.
When length its measure using devices
like a tape measure or scale.
We get the same measure.
No matter how measure is.
Let us see what are can be
measured using a measuring scale or a tape measure.
We can measure the height of
furniture or our height, the length and breadth of cloth or table, the deep of
tank or vessel & the thickness of the book or a door or a table.
You can have a lot of fun
measuring with the tape measure or scale. Those have fun!
BÀI 6
Hey Stary! I want to buy a new
table cloth, the old one has been torn a little.
But I’m not sure how big the table
cloth should be?
Hey! I have an idea.
We shall fisrt measure the length
of the table and then I can get the table cloth of that size.
Stary ! we shall measure the
length of the table with a span.
A span is formed when the fingers
are spead out.
The length of this table is 7
spans.
Hey ! we can also measure the
length of the table using an arm-length.
An arm –length is also known as a
cubit?
Let’s measure the length of the
table.
The length of the table is 3 arm
lengths , 3 cubits.
Stary! Just like we use a span or
an arm-length to measure the length.
we can also use the feet and pace
for measuring the lengths.
Look at the picture shows here.
Ram is measing the length of his
room using his foot.
the length of his room is 20
foot-lengths.
But stary! what if Ram had to
measure the length of his garden.
Measuring the foot would take a
long time.
So Ram measures the length of the
garden with his pace.
It was 8 paces long.
Stary, can you think of any other
ways in which we can measure the length ?
Yes, we can also measure the
length using a pencil or a stick or a rod.
Stary! take a look at these 2
pictures.
In the 1st picture we see that the
girl measured the length of the blackboard by using arm-lengths.
It lengths was 4 arm lengths.
In the 2nd pictures the teacher
has measured the length of the same blackboard using her arm lengths.
Now the length of the blackboard
is 3 arm lengths.
In the picture given here.
the length of the carpet was
measured by the boy using his foot length.
The length was 12 foot lengths.
The same carpet was measured by
the father using his foot length
Now the length of the carpet was 9
foot lengths.
Can you tell Stary why is there a
difference in the lengths of the same objects?
You are smart, Stary.
The number of arm-length or foot
length counted by both the people in each people is not the same
because the length of their arm or feet is not the same .
Hey Stary,See here are some chart
papers.
let’s measure the length of this
chart paper using a ruler.
The length of the chart paper is 2
ruler lengths.
What’s happen Stary ?
you have already measured of the
length of the chart paper using the same scale.
What answer did you get ? 2 ruler
lengths.
That’s great !
So it mean if we measure the
length of the object with the same instrument then the measure remain the same
no matter who measure it.
Stary ! Let’s now find the length
of these rod.
The rods have been labeled A, B,
C, D to identify them.
Let’s use the scale again.
The length of the rod A is 2 ruler
length .
Now let measure the length of rod
B.
The length of the rod B is 2 ruler
lengths.
What is the measure of the 3rd
rod, Stary?
It looks smallest. Hey ! Its
length is only 1 ruler length.
Now, let’s measure the last rod.
The length is equal to the length
of the rod B . that is 3 ruler lengths.
Stary ,our rod A and rod B which
rod has less length.
Yes, the length of rod A is less
than the length of rod B.
Our rod D & C whose length is
more?
yes, the length of rod D is more
than the length of rod C.
Stary, Here are the name of some
articles, you have to give the best possible method of measuring their lengths.
+ The first one is a book.
How we use measure in the length
Stary?
yes, by using the span of your
hand.
+ The height of cupboard is the
best measure by an arm-length.
+ What about the length of the
ground, Stary?
yes, we measure it by using the
pace of the foot.
+ The last is the length of
ribbon.
We can measure it using an
arm-length.
BÀI 7
Hey stary! You are aware that we
need a standard device or instrument for measurement?
To measure them we need advice
call measuring scale.
Look at the scale. Do you note
some marking and number on it Stary?
Yes, of course. There are number
up to 15.
Each number shows the distance a
centimetre.
For
example
0 to 1 : a centimetre
12 to 13 : a centimetre
And 5 to 6 is also a centimetre.
Stary, look closely! Do you see
something else?
Right! There are smaller marking
within each centimetre.
Come, let us count the small
marking 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
Thus, each centimetre has 10 such
small divisions.
Stary, each such small division is
called a millimetre.
So, we can see that 1 centimetre
has 10 millimetres.
Now if we have 2 centimetres.
There will be 20 such small divisions.
So 2 centimeters will have 20
millimetres.
In the same manner 5 centimetres
will be equal to 50 millimetres and 10 centimetres will be equal to 100
millimetres.
Centimetre and millimetre are
written in short as ‘cm’ and ‘mm’.
so we can say 8cm is equal to
80mm.
Stary! We can measure smaller
lengths using a measuring scale.
For example
The thickness of breadth of a
notebook or length of craft paper.
Hey! Why have you brought that
cloth. Oh, Stary!
We cannot measure the length of
cloth using a measuring scale.
We need a meter scale for measure
longer length- the meter scale .
Look at this scale Stary. This is
a meter scale. Observe!
The last number show here is 100.
So there are 100 cm on it. So 1
meter contains 100 cm.
It will write meter in short as
‘m’.Then 1m equal 100cm.
What are you thinking of Stary. Oh
you want to measure greater distances.
Greater distances!
Greater distance likes length of
the room are measured using another instrument call a measuring tape.
This tape has length more than 1
meter.
So Millimetre, Centimetre,
Meter are standard units for
measuring length by standard units.
It mean that anywhere you go these
are the accepted units for measuring length
BÀI 8
Hey Stary! Look. Here is the box
of pencils. There are 10 pencils in this box.
Let us form pairs. That is group
of 2 pencils each for both of us .
Here it is 1st pair, 2nd pair, 3rd
pair, 4th pair and 5th pair.
Is any pencil let behind Stary?
No? Stary! no pencil is let behind
after making groups of 2 each from 10 pencils ,
so 10 is known as an even number.
Don’t you know we also need
erasers along with these pencils?
Yes, see. I have got a box of
erasers too.
But it has only 7 erasers. Let us
see Stary! How many pairs are form.
Here are they 1st pair, 2nd pair,
3rd pair.
Look Stary !1 eraser is let by
itself.
So we say that 7 is an odd number.
Stary, if one object is left over
after pairing then the number of objects is odd.
If no object is left after
pairing, then number of objects is even.
Look at this number Stary. Number
from 1 to 20 is written in it.
Starting from 1 circle every odd
number.
So let circle the number 1, 3, 5,
7, 9, 11, 13, 15, 17 &19 .
Stary! Can we form a pair with 1
object? you’re right we can’t form a pair with 1 object.
Now let us circle the next circle
number that is 3.uhm.
Here is 3 chocolates, Stary! Can
you form pair with it?
only 1 pair is formed , &1
chocolate is left by itself.
So Stary the 3 is an odd or even
number? Yes, 3 is an odd number.
See Stary, the remaining circle
number has been written here.
Consider the number 5. Let’s form
the pairs of line.
Here 2 pairs are form and 1 line
is left by itself.
What’s about the number 7 stary?
Yes!
Here are 3 pairs are form and 1
line is left by itself.
Similarly we observe that is odd
number 9, 11, 15,17& 19 .
1 line is left behind.
Can you tell me what is common in
all the number?
Yes, all the number 1, 3, 5, 7, 9,
11, 13, 15, 17,19 are odd numbers.
Now Stary, list these number are
not circle.
Yes, the numbers are 2, 4, 6, 8,
10, 12, 14, 16, 18, 20 .
How many pairs are form with 2
object, Stary? Yes, only 1 pair
.
Which is the next number, Stary?
Yes, it is 4.
Let’s see ! what do we have here?
Yes, here we have 4 crayons .
Can you tell me how many groups of
2 crayons will be form?
Yes, 2 pairs are form and no
crayon is left by itself.
So we can say that 4 is an even
number.
Hey! Stary, it’s time to look at
the other number.
The number is written here is 6.
let us form pairs with 6 sticks.
Can you count the number of pair
Stary,
yes 3 pairs of sticks are formed
and no stick is left behind.
so 6 is an even number.
Observe carefully! when we form
pair of sticks with number 8, 10, 12, 14, 16, 18 and 20 no sticks are left
behind.
So we now know that the number 2,
4, 6, 8, 10, 12, 14, 16, 18 and 20 are even numbers.
Stary! It is not possible to form
pairs of objects everytime to decide if the number is odd or even
Stary! It is not possible to form
pairs of objects everytime to decide if the number is odd or even
Here is a nice idea.
If the number 1, 3, 5, 7, or 9 are
found in the unit place of the numbers,
then they are called odd numbers.
If the number 2, 4, 6, 8 or 0 are
found in the unit place of the numbers,then they are called even numbers.
I’m sure you are can now easily
identify odd & even number.
Ok! Then let us saw a few example.
Here are some numbers.
Can you identify which one are odd
number and which one are even numbers?
Let’s start with number 21.
It has a district 1 in the unit
place so 21 is an odd number.
Number 38 has 8 in the unit place
so it is an even number.
In the number 43 the district in
the unit place is 3,so 43 is an odd number.
the next number is 57. will it be
odd or even number, Stary?
Yes since the district in the unit
place is 7. 57 is an odd number.
Similarly we see that the number
64, 70, 96 and 58 are even numbers and they have 4, 0, 6 and 8 in their unit
place.
Stary we are now left with the
number 89 and 25 .
the number 89 and 25 are odd and
they have 9 and 5 in their unit place.
Now let us saw the next example.
Stary fill in the missing odd
numbers in this strip.
the odd number given are 33, 37,
41, 49 so which are missing odd numbers .
Yes they are 35, 39, 43, 45 and
47.
The next example is simple Stary.
we have to write 10 consecutive
even number after 62.
Come on write fast.Yes, 64, 66,
68,70,72, 74, 76, 78, 80, 82
Stary remember we can easily find
out whether a given number is odd or even by observing the district in each
unit place
BÀI 9
here are some stickers with
numbers on them.
Pick any find stickers you like.
Oh, you have already chosen the
stickers which you like.
Good Starry, look at the stickers!
All of them have even numbers on
them, like that confused look Starry.
Uh, you seem to have forgotten
about even numbers.
Okay, let us device.
If any of the digits 0, 2, 4, 6, 8
is in the units place of a number, then it is an even number.
Look at the units place of these
numbers.
Each number has 0, 2, 4, 6, or 8
in the units place.
So these are even
numbers.
Now, if any of the digit 1, 3, 5,
7, 9 is in the units place of a number then it is odd numbers.
Look at the units place of these.
Each number has either 1, 3, 5, 7, or 9 in the units place.
So these numbers are odd numbers.
Starry, isn’t it interesting!
Now, let us do an activity. Circle
the even numbers.
The even numbers are 356, 22, 600,
18, and 64.
Now, let us circle the odd
numbers.
The odd numbers are 39, 617, 25,
183, 111.
Now, let us do something
interesting. Let us make two three digit numbers using the given digits.
The even numbers made by using 5,
8, and 3 are 358 and 538.
The even numbers made using the
digits 4, 1, 7 are 174 and 714.
The even numbers made by using the
digits 9, 5, 0 are 950 and 590.
Now, let us make two three digit
odd numbers using the even digits.
The odd numbers made by using 6,
4, 9 are 649 and 469.
The odd numbers made by using the
digits 0, 3, 7 are 703 and 307.
The odd numbers made by using 5,
2, 6 are 265 and 625.
So, today we have learned about
three odd and even numbers and how to make such numbers using the given digits.
Byeee, see you again!
0 comments:
Post a Comment