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NCERT Textbook - Birds Come, Birds Go | Mathematics for Class 2: NCERT PDF Download

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 Page 1


2019-20
Page 2


2019-20
Uhm---m!
One       card for
this whole group!
10
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
1
But where
did they all
come from?
So, these cards
show 16 birds.
10
1
1
1 1
1 1
112
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
Now putting together
all the       s, we get
four       s.
113
2019-20
Page 3


2019-20
Uhm---m!
One       card for
this whole group!
10
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
1
But where
did they all
come from?
So, these cards
show 16 birds.
10
1
1
1 1
1 1
112
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
Now putting together
all the       s, we get
four       s.
113
2019-20
Uhm---m!
One       card for
this whole group!
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
But where
did they all
come from?
So, these cards
show 16 birds.
112
So, the total number of birds is 41.
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
D Soon 25 more birds flew in. Let us add to see how many
birds in all there are now.
For 16 + 25 we write:
+
10
1
10 10 1 1 1 1 1
10
1 1 1
1 1 1
1 6
2 5
+
10
1
10 10 1 1 1 1 1
10
1 1 1
1 1 1
10
1 6
2 5
1
1
+
10
1
10 10 1
10 10
1 6
2 5
4 1
1
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
1
10
1
1
1
Now putting together
all the       s, we get
four       s.
10
10
113
2019-20
Page 4


2019-20
Uhm---m!
One       card for
this whole group!
10
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
1
But where
did they all
come from?
So, these cards
show 16 birds.
10
1
1
1 1
1 1
112
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
Now putting together
all the       s, we get
four       s.
113
2019-20
Uhm---m!
One       card for
this whole group!
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
But where
did they all
come from?
So, these cards
show 16 birds.
112
So, the total number of birds is 41.
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
D Soon 25 more birds flew in. Let us add to see how many
birds in all there are now.
For 16 + 25 we write:
+
10
1
10 10 1 1 1 1 1
10
1 1 1
1 1 1
1 6
2 5
+
10
1
10 10 1 1 1 1 1
10
1 1 1
1 1 1
10
1 6
2 5
1
1
+
10
1
10 10 1
10 10
1 6
2 5
4 1
1
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
1
10
1
1
1
Now putting together
all the       s, we get
four       s.
10
10
113
2019-20
114
In the same way, we will add the number of swans
and cranes.
Also try adding
without writing.
The total number of swans and cranes is ___________.
Number of Swans
Number of Cranes
+
10
1
3 9
3 1
10 10 10 1
1 1 1 1 1
1 1 1 1
10 10 10
Suraj, don't be sad!
Let us hope they
come back next year.
115
There are
31 cranes and
39 swans.
Let us find out
how many swans
and cranes
there are in all.
How Many Cranes and Swans?
2019-20
Page 5


2019-20
Uhm---m!
One       card for
this whole group!
10
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
1
But where
did they all
come from?
So, these cards
show 16 birds.
10
1
1
1 1
1 1
112
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
Now putting together
all the       s, we get
four       s.
113
2019-20
Uhm---m!
One       card for
this whole group!
Thiscouldbeagoodchancetoinitiateadiscussionaboutmigratingbirdscomingfromfar-off
places. Alsoencourageandhelpchildrentorecognisepatternsinwhichdifferentbirdsfly.
Let us count
them using
our cards.
And six      cards
for this group
of birds.
But where
did they all
come from?
So, these cards
show 16 birds.
112
So, the total number of birds is 41.
Inchapter8,childrenwouldhavemadetokencards.Thesametokencardsshouldbeused
beforechildrendowrittensums.
D Soon 25 more birds flew in. Let us add to see how many
birds in all there are now.
For 16 + 25 we write:
+
10
1
10 10 1 1 1 1 1
10
1 1 1
1 1 1
1 6
2 5
+
10
1
10 10 1 1 1 1 1
10
1 1 1
1 1 1
10
1 6
2 5
1
1
+
10
1
10 10 1
10 10
1 6
2 5
4 1
1
Putting all the      s
together, we get
eleven      s. Of
those, ten      s
make one .
And we are left
with one .
1
10
1
1
1
Now putting together
all the       s, we get
four       s.
10
10
113
2019-20
114
In the same way, we will add the number of swans
and cranes.
Also try adding
without writing.
The total number of swans and cranes is ___________.
Number of Swans
Number of Cranes
+
10
1
3 9
3 1
10 10 10 1
1 1 1 1 1
1 1 1 1
10 10 10
Suraj, don't be sad!
Let us hope they
come back next year.
115
There are
31 cranes and
39 swans.
Let us find out
how many swans
and cranes
there are in all.
How Many Cranes and Swans?
2019-20
114
Also try adding
without writing.
_____________ birds have gone away.
Suraj, don't be sad!
Let us hope they
come back next year.
115
–
10
1
7 0
2 6
10 10
1 1 1
1 1 1
10 10 10 10
10 10 10
One morning, Suraj saw that out of 70 birds only 26
birds were left. The rest had gone away.
How many birds have gone away? D
There are
31 cranes and
39 swans.
Let us find out
how many swans
and cranes
there are in all.
How Many Cranes and Swans?
2019-20
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FAQs on NCERT Textbook - Birds Come, Birds Go - Mathematics for Class 2: NCERT

1. What is the main theme of the NCERT textbook "Birds Come, Birds Go"?
Ans. The main theme of the NCERT textbook "Birds Come, Birds Go" is to provide information about the migration patterns of birds and their importance in the ecosystem.
2. How do birds migrate?
Ans. Birds migrate by following specific routes and patterns. They use various cues such as celestial navigation, landmarks, and magnetic fields to navigate during their long-distance journeys.
3. Why do birds migrate?
Ans. Birds migrate for various reasons, including seeking better breeding grounds, escaping harsh weather conditions, and finding abundant food sources. Migration allows them to survive and reproduce in different habitats throughout the year.
4. What are some examples of migratory birds mentioned in the textbook?
Ans. Some examples of migratory birds mentioned in the textbook "Birds Come, Birds Go" include the Siberian crane, Arctic tern, bar-headed goose, and Amur falcon.
5. How do birds prepare for migration?
Ans. Birds prepare for migration by building up fat reserves to provide energy during their long flights. They also undergo physiological changes, such as increasing their red blood cell count, to adapt to high-altitude flights. Additionally, they exhibit behavioral changes, such as forming flocks and engaging in social interactions, to navigate and survive during migration.
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Document Description: NCERT Textbook - Birds Come, Birds Go for Class 2 2024 is part of Mathematics for Class 2: NCERT preparation. The notes and questions for NCERT Textbook - Birds Come, Birds Go have been prepared according to the Class 2 exam syllabus. Information about NCERT Textbook - Birds Come, Birds Go covers topics like and NCERT Textbook - Birds Come, Birds Go Example, for Class 2 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for NCERT Textbook - Birds Come, Birds Go.
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