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14. Birds Come, Birds Go

Few children are in a park, in which there is also a waterbody. There are some birds in water and some are flying. The children are counting the total number of birds.

Hey! There are 25 birds here.

Look up! Look up! Some new birds are coming.

A boy is saying that lets count the birds using cards. The children have used a square card with number ten on it for a group of ten birds. A boy is using six triangle shaped cards with number one written on each card for a group of six birds.

There are six triangular cards and one square card, making a total of sixteen. Children are discussing that where do these birds come from.?

This could be a good chance to initiate a discussion about migrating birds coming from far- off places. Also encourage and help children to recognise patterns in which different birds fly.

Soon 25 more birds flew in. Let us add to see how many birds in all there are now.

For 16 + 25 we write:

Sixteen is added to twenty five. There are ten squares and six triangles in front of sixteen and two squares and five triangles in front of twenty five. In the sum given above, ten triangles are crossed and it is written putting all the ones together, we get eleven ones of those, ten ones make ten and we are left with one ones. In the above sum, there are four squares and a triangle and it is written, Now putting together all the tens, we get four tens.

So, the total number of birds is 41.

In chapter 8, children would have made token cards. The same token cards should be used before children do written sums.

How Many Cranes and Swans?

A boy is asking how many cranes and swans are there in all. A group of children is replying that there are thirty one cranes and thirty nine swans. Number of swans is added to the number of cranes. Thirty nine is added to thirty one. At the ones place, a triangular card is drawn and a square card is drawn at the tens place. There are three sqaure cards and nine triangular cards drawn in front of thirty nine. There are three square cards and one triangular card drawn in front of thirty one.

In the same way, we will add the number of swans and cranes.

Also try adding without writing.

Total number of swans and cranes is ....... .

A lot of birds are flying in the sky.

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?

Twenty six is subtracted from seventy and a blank space is given for writing the answer. There are seven square cards in front of seventy and two square cards and six triangles in front of twenty six. A man is telling a boy, not to be sad and to hope that they will come back next year.

Practice Time

Rahul scored 23 runs in a cricket match and Dhoni scored 69. How many runs did they make in all?

Twenty three is added to sixty nine and a blank space is given for writing the answer. There is a cricket match image drawn next to the addition sum.

Dema sold 48 shawls in a fair. Next day he sold 17 more shawls. How many shawls in all did he sell?

There is a square card at the tens place and a triangle card at the ones place and rest of the entries in the sum are blank. Then it is written, Dema sold____ shawls in all.

Bunnu rabbit can eat 29 carrots in one week. Munnu rabbit can eat 42 carrots in one week. Who eats more in a week, and by how much?

There is a square card at the tens place and a triangle card at the ones place and rest of the entries in the sum are blank. Then it is written, ___ eats ___ more carrots. Two rabbits are drawn too.

Neha is 29 years old. Her mother is 58 years old. How many years older is Neha's mother?

There is a square card at the tens place and a triangle card at the ones place and rest of the entries in the sum are blank. Then it is written, Mother is ___ years older than Neha.

Find the Answer

	2	4
+	1	7

	3	2
-	2	7

	6	8
+	1	3

	1	9
+	3	9

	5	4
+	4	3

	7	3
-	5	9

	8	0
-	6	7

	4	3
-	2	7

	3	9
-	2	5

	4	8
+	3	8

	9	4
-	8	7

	7	6
-	2	8

More such examples may be set for practice.

Catch the Right Bus!

Too many buses are there at a bus stop. There is a man with few children, the man is saying to solve twenty seven added to twenty two to match the total with the bus number.

A girl is holding a card in her hand, in which forty eight is added to nineteen A boy is holding a card in his hand in which, twenty one is subtracted from eighty eight.
A boy is holding a card in her hand, in which thirty seven is added to twelve.

A man is saying to write your own numbers and to make two different cards.

A number is to be subtracted from another such that the result is forty nine. A number is added to another number such that the sum is seventy five.

A number is to be subtracted from another such that the result is sixty seven. A number is added to another number such that the sum is seventy five.

More such exercises can be done to make children see how any number can be made using different combinations of numbers by addition and subtraction.

Cross Me Out!

A boy is sitting on a floor with some blank square boxes drawn on a board. A girl is sitting on the floor and there is a board on which some numbers are written like forty, thirty eight, thirty seven, fifteen, twenty eight, thirty six, twenty four, fourteen, forty nine, forty eight and forty two. A woman is saying to cross a number by adding twenty seven and twelve. A girl is sitting on the floor and there is a board on which some numbers are written like forty, thirty eight, thirty seven, fifteen, twenty eight, thirty six, twenty four, fourteen, forty nine, forty eight and forty two.

27 + 10 = 37 and plus 2 is 39.

Parents can help children in playing this game. Call out simple addition sums like 18 + 4. Gradually proceed to more challenging additions. Also give children turns to speak out numbers while parents do the crossing out. Similar games can be used for subtraction as well.

A girl is sitting on the floor and there is a board on which some numbers are written like forty, thirty eight, thirty seven, fifteen, twenty eight, thirty six, twenty four, fourteen, forty nine, forty eight and forty two.

Ask your teacher or friend to speak out two numbers to add. Continue with this game further.

Chakachak Toli

A group of children cleaning a park using brooms.

Chakachak in Hindi means clean and shining. Chakachak Toli is the name of a group of children who work to clean their park.

Shreya collects the money and writes it in her diary. Help Shreya to find how much money is left at the end of the month.

The page of a diary showing the money collected by Shreya in October and the money spent by her and a blank spaces are given for writing total money collected, total money spent and money left at the end of October.

Children of Chakachak Toli counted the number of trees in the park.