LỚP 3 :PHÀN LỜI BÀI 1-9

BÀI 1

Shapes of solids – cube, cylinder, cone, sphere.

Starry, are we having a party today?

Balloons, party hats, presents, ice-creams even a cake.

Look at these party hats Starry!

They are of different shapes.

This one is in the shape of the cube. C-u-b-e, cube.

And this Starry, is a cone. C-o-n-e.

And what about this one Starry?

You don’t know this shape. It is a cylinder. C-y-l-i-n-d-e-r.

Oh… more shape Starry, the cake is in the shape of the cube.

And these presents, this is a cube.

And this one is in cylinder.

Starry, don’t you want to know what this shape is.

This ball is shape of the sphere. S-p-h-e-r-e, sphere.

And these beads too a sphere.

You are looking at the ice-creams Starry.

They are cones.

And these candles Starry, are like cylinders.

So Starry, what are the different shapes that we have learnt at this party today?

Yes, we have learnt the c-u-b-e, cube.

The c-o-n-e, cone.

The c-y-l-i-n-d-e-r, cylinder.

The s-p-h-e-r-e, sphere.

Now let’s do an activity together!

Can you identify the shapes?

Let’s begin!

This ball is a sphere.

The dice is in the shape of the cube.

And this is a cone.

Now Starry, this present is in the shape of the cylinder.

Oh.. .and a cube, a cube Starry!

A bead is a sphere Starry.

This beautiful cake is in the shape of cylinder.

This is a rubik’s cube, c-u-b-e Starry.

                      

BÀI 2

Wow, jigsaw puzzle.

Starry, how many pieces does it have?

You don’t know. Look, it’s written on the box.

6 and 0. Oh Starry I forgot you don’t know what number that is.

                                                 

6 and 0 is 60 Starry, the puzzle has 60 pieces.

60 is the number that comes after 59, s-i-x-t-y.

Let me explain it to you with these strings of beads.

Each of this string has 1-2-3-4-5-6-7-8-9-10 beads.

Now there are 1 ten+1 ten+1 ten+1 ten+1 ten+1 ten that’s 60 beads Starry, 6 tens, 60.

Suppose we add 1 single bead to these beads Starry that would be 6 tens and 1, 61, s-i-x-t-y o-ne, 61.

On adding 2 beads we get 6 tens 2 units, 62, s-i-x-t-y t-w-o, 62.

Now Starry, let’s add 1-2-3 beads, that gives us 6 tens 3 units, 63, s-i-x-t-y t-h-r-e-e, 63.

That should we do next Starry, let’s add 4 beads. Now we get 6 tens 4, 64, s-i-x-t-h f-o-u-r, 64.

And 6 tens plus 1-2-3-4-5 beads is 6 tens 5, 65 Starry, s-i-s-t-h f-i-v-e.

Now 6 tens plus 6 beads is 6 tens 6, 66, s-i-x-t-h s-i-x, 66.

Here are 7 beads Starry, let’s add them to the 6 tens we get 6 tens 7 that’s 67, s-i-x-t-h s-e-v-e-n, 67.

And 6 tens plus 8 is 6 tens 8, 68, s-i-x-t-y e-i-g-h-t, 68.

Finallly what do we have Starry, 6 tens plus 1-2-3-4-5-6-7-8-9, which is 6 tens 9 units, 69, s-i-x n-i-n-e.

There’s Starry, you have now learnt the numbers in ascending order from 60 to 69.

Let’s count them again!        

60-61-62-63-64-65-66-67-68-69      

And from the biggest to the smallest in descending order we go 69-68-67-66-65-64-63-62-61and 60.

Now shall we revise what we have just studied Starry!

Identify the numbers and match them with their number names.

The first number is

66, s-i-x-t-h s-i-x.

60 s-i-x-t-y

69, s-i-x n-i-n-e.

63, s-i-x-t-y t-h-r-e-e

67, s-i-x-t-h s-e-v-e-n

61, s-i-x-t-y o-ne

68, s-i-x-t-y e-i-g-h-t

62, s-i-x-t-y t-w-o

And in this activity all the numbers have been mixed up.

We have to put them in the correct serial order.

Let’s begin!

60-61-62-63-64-65-66-67-68 and 69.

Remember Starry, 6 and 0 is the number 60.

And what comes after it in series order 61-62-63-64-65-66-67-68 and 69.

BÀI 3

Starry, do you remember your number from 60 to 69?

Let us revise them!

60-61-62-63-64-65-66-67-68 and 69

Today Starry, we will learn about the number that comes after 69.

It’s is the number 7 and 0, 70. It spells s-e-v-e-n-t-y, 70

Now look at these garlands of flowers Starry!

They are 1-2-3-4-5-6-7-8-9-10 flowers in each garland.

And there are 1 tens +1 tens +1 tens +1 tens +1 tens +1 tens +1 tens +1 tens that’s 7 tens, 70 flowers.

Now suppose I add a singular flower to these 7 garland, I get 7 tens 1 which is 71, s-e-v-e-n-t-y o-n-e, 71.

On adding 2 flowers we get 7 tens 2 that 72, s-e-v-e-n-t-y t-w-o,72.

When 1-2-3 flowers are added to the 7 garlands it’s formed 7 tens 3 which is 73, s-e-v-e-n-t-y t-h-r-e-e, 73.

Now 7 tens plus 1-2-3-4, gives us 7 tens 4 which is the number 74, s-e-v-e-n-t-y f-o-u-r, 74.

And 7 garlands plus 5 flowers it’s 7 tens 5 which form the number 75, s-e-v-e-n-t-y f-i-v-e.

On adding 1 more flower, now look Starry, we get 7 garlands plus 6 flowers that 7 tens 6 which is the number 76, s-e-v-e-n-t-y s-i-x, 76.

Now 7 garlands plus 7 flowers is 7 tens 7 that is 77, s-e-v-e-n-t-y s-e-v-e-n, 77.

Starry, here are 7 garlands plus 1-2-3-4-5-6-7-8 flowers that’s 7 tens 8, 78, s-e-v-e-n-t-y e-i-g-h-t, 78.

And finally, 7 garlands and 9 flowers that’s 7 tens 9, 79, s-e-v-e-n-t-y n-i-n-e, 79.

Now Starry, let’s count in the ascending order, that is from the smallest to the biggest.

70-71-72-73-74-75-76-77-78-79.

And again Starry in the descending order from the biggest to the smallest. We go!

79-78-77-76-75-74-73-72-72-71and 70.

Now let’s do an activity together all the number from 70 to 79.

Identify the number and write the number name.

Shall we begin Starry!

7 and 8 that 78, s-e-v-e-n-t-y e-i-g-h-t

7 and 1 71, s-e-v-e-n-t-y o-n-e         

7 and 5, 75, s-e-v-e-n-t-y f-i-v-e

7 and 3 that 73, s-e-v-e-n-t-y t-h-r-e-e

7 and 9, 79, s-e-v-e-n-t-y n-i-n-e

7 and 2, 72, s-e-v-e-n-t-y t-w-o

And 7 and 0 that 70, s-e-v-e-n-t-y

In this activity Starry, you have to circle the biggest number.

7 tens 3 and 7 tens 5, now Starry, 7 tens 3 is 73 and 7 tens 5 is 75. So the bigger number is 75, 7 tens 5.

7 tens 8 and 7 tens 9, 7 tens 8 is 78 and 7 tens 9 is 79. The bigger number Starry is 79, 7 tens 9.

74 and 76, the bigger number is 76.

72 and 70, the bigger number is 72.

7 tens 6 and 7 tens 3, here Starry, 7 tens 6 is 76 and 7 tens 3 is 73 the bigger number is 76.

And in this last activity Starry all the numbers are jumble up, we have to put them in the correct serial order.

Let’s begin with 70 then we have 71-72 and 73 next is 74 -75-76-77-78 and 79.

Wasn’t that fun Starry, learning numbers from 70 to 79. I’m sure it was

BÀI 4

Hey Starry, that’s very interesting book, ROUND THE WORLD IN 80 DAYS.

Are you reading it? Oh, you did not know what the number in the title was.

It’s 8 and 0 Starry, 80, e-i-g-h-t-y, 80.

The number 80 comes after 79.

Remember these strings of beads Starry?

Each string has 10 beads.

So ten+ten+ten+ten+ten+ ten+ten+ten that’s 8 tens, 80 beads.

Now suppose we add a single bead to these 8 sets of beads we get 8tens 1 which is 81, e-i-g-h-t-y o-n-e.

On adding 2 beads we get 8 tens 2 that 82, e-i-g-h-t-y t-w-o, 82.

When 3 beads are added to these 8 sets of beads it forms 8 tens 3 which is the number 83, e-i-g-h-t-y t-h-r-e-e, 83.

Now 8 tens plus 1-2-3-4 beads gives us 8 tens 4, which is the number 84, e-i-g-h-t-y f-o-u-r, 84.

And 8 sets of beads plus 5 beads it is 8 tens 5 which forms the number 85, e-i-g-h-t-y f-i-v-e, 85.

On adding 1 more beads Starry, we 8 sets of beads plus 1-2-3-4-5-6 beads that 8 tens 6 which is the number 86, e-i-g-h-t-y s-i-x, 86.

Now 8 sets of beads plus 7 beads is 8 tens 7 that is the number 87, e-i-g-h-t-y s-e-v-e-n.

Starry, here are 8 sets of beads plus 1-2-3-4-5-6-7-8 beads, that’s 8 tens 8, 88, e-i-g-h-t-y e-i-g-h-t.

And 8 sets of beads and 9 single beads is 8 tens 9, 89, e-i-g-h-t-y n-i-n-e.

Counting in the ascending order from 80-81-82-83-84-85-86-87-88-89.

And in the descending order 89-88-87-86-85-84-83-82-81-80.

Around the world in 80 days Starry!

Now let’s do an activity together.

Identify the numbers on the map and write the correct number name.

8 and 3, 83, e-i-g-h-t-y t-h-r-e-e

8 and 0, 80, e-i-g-h-t-y

8 and 9, 89, e-i-g-h-t-y n-i-n-e

8 and 4, 84, e-i-g-h-t-y f-o-u-r

8 and 2, 82, e-i-g-h-t-y t-w-o

8 and 7, 87, e-i-g-h-t-y s-e-v-e-n

And now Starry, we have to look at this numbers ladder and fill in the missing numbers.

The number that comes above 83 is dash, The number that comes above 83 is 84.

The number below 88 is dash. The number below 88 is 87.

The number between 87 and 89 is dash. The number between 87 and 89 is 88.

The number that comes above 85 is dash. The number that comes above 85 is 86.

The number below 81 is dash. The number’s below 81 is 80.

The number between 82 and 84 is dash. The number between 82 and 84 is 83.

The number that comes above 87 is dash. The number that comes above 87 is 88.

Starry, don’t forget the number that comes after 79 is 80, e-i-g-h-t-y, 80.

BÀI 5

Starry, are you getting ready for you first day at school.

So many books to cover, come, let me help!

These books have 25 pages each and these have 50 pages.

These books have 25 pages each and these have 50 pages.

You look worry, you can’t find the book with 90 pages. It’s right here Starry.

Look, 9 and 0, 90. Oh, you haven’t learnt the number 90 yet.n-i-n-e-t-y, Starry, 90.

Now let me explain the number 90 to you.

Each pile of book has 10 books in it. That ten+ ten+ten+ten+ten+ten+ten+ten+ten, 9 tens, 90 books.

Starry, suppose we add a single book to these pile of books. We get 9 tens 1, which is 91, n-i-n-e-t-y o-n-e.

On adding 2 books, we get 9 tens 2 that’s 92, n-i-n-e-t-y t-w-o, 92.

When 1-2-3 books are added Starry to the 9 pile of books, it forms 9 tens 3, which is the number 93, n-i-n-e-t-y t-h-r-e-e, 93.

Now 9 tens plus 4 books gives us 9 tens 4, which is the number 94, n-i-n-e-t-y f-o-u-r.

And 9 pile of book plus 5 books is 9 tens 5 which forms the number 95, n-i-n-e-t-y f-i-v-e, 95.

When we add 1 more book, we get 9 pile of books plus 1-2-3-4-5-6 books that 9 tens 6, which is the number 96, n-i-n-e-t-y s-i-x, 96.

Now 9 pile of books plus 1-2-3-4-5-6-7 books is 9 tens 7, that is the number 97,   n-i-n-e-t-y s-e-v-e-n, 97.

Starry, here are 9 pile of books plus 8 single book that’s 9 tens 8, 98, n-i-n-e-t-y e-i-g-h-t, 98.

And 9 pile of books and 9 single books is 9 tens 9, 99, n-i-n-e-t-y n-i-n-e, 99.

Starry, let’s count the numbers in the ascending order from 90 to 99. That’s 90-91-92-93-94-95-96-97-98-99.

And in the descending order 99-98-97-96-95-94-93-92-91-90.

Now let’s do an activity together!

Identify the numbers and write the number names.

9 and 3, 93, n-i-n-e-t-y t-h-r-e-e

9 and 8, 98, n-i-n-e-t-y e-i-g-h-t

9 and 2, 92, n-i-n-e-t-y t-w-o

9 and 7, 97, n-i-n-e-t-y s-e-v-e-n

9 and 9, 99, n-i-n-e-t-y n-i-n-e            

9 and 0, 90, n-i-n-e-t-y

And in this activity Starry, the numbers are all jumble up.

We have to first put them to the correct in the ascending order from the smallest to the biggest, and then in the descending order from the biggest to the smallest.

Shall we begin!

The first number is 9 and 0, 90 then we have 91-92-93-94 next 95-96-97-98 and lastly 99.

And now Starry, in the descending order 99-98-97-96-95-94-93-92-91and 9 and 0, 90.

Starry, if you see the number 9 and 0 anywhere, remember it stands for the number 90.

The numbers that follow are 91-92-93-94-95-96-97-98 and 99.

BÀI 6

Why does the TV say on so loud Starry?

What a noise!                     

Cricket to, wow. I understand the baseman is scored his first hundred.

There is the flashing on the screen. You’re happy for the baseman Starry.

But you did not know what 1-0-0 stood for.

1-0-0 Starry, hundred, hundred runs.

             

Wait, let me explain.

Suppose we draw line on this board.

For each run that 10+10+10+10+10+10+10+10+10+10+10 that 10 tens, hundred runs, 100.

Starry, let’s count the tens again.

10-20-30-40-50-60-70-80-90 and 100, 1 hundred.

Now look at these garlands Starry! Each garland has 10 flowers, in all we have 10+10+10+10+10+10+10+10+10+10 that 10 tens, 100 flowers, 1 hundred.

10-20-30-40-50-60-70-80-90 and 100, 1 hundred flowers in all.

And here, let me show you these beads. Each set of beads has 10 beads in it.

So we count the beads together.

10+10+10+10+10+10+10+10+10+10+10 that 10 tens, 100 beads.

Finally, let’s count these books Starry!

Each pile has 10 books in it.

So 10+10+10+10+10+10+10 +10+10+10   that 10 tens, 100 books, 100, h-u-n-d-r-e-d.

And now let’s do an activity together.

Here is the number line with numbers from 90 to 100. Choose the correct answer from the bracket.

The number that is to the right of 99 is dash (98/100) 100

The number between 98 and 100 is dash (99/97)99

The number 100 is dash than the number 99 (greater/less) greater

The number 99 is dash then the number 100 (less/greater)  less

Starry, if ever you see hundred flashing on a screen during a cricket match it means that the baseman has scored h-u-n-d-r-e-d, 100 runs.

BÀI 7

10, 20, 30, 40, 50, 60, 70, 80, 90,100

Ready, Starry, you thought we were going to play hide and seek again. Not right now Starry, because today we have to practice reading numbers from 1 to 100.

Look at this board. Shall we begin reading the numbers in serial order Starry.

1-2-3-4-5-6-7-8-9-10

Now the next column Starry!

11-12-13-14-15-1617-18-19-20

Here is

21-22-23-24-25-26-27-28-29-30

And now

31-32-33-34-35-36-37-38-39-40

41-42-43-44-45-46-47-48-49-50

The number that comes after 50 is 51 then 52-53-54-55-56-57-58-59-60

The next column is      

61-62-63-64-65-66-66-67-68-69-70

Then 71-72-73-74-75-76-77-78-79-80

Now 81-82-83-84-85-86-87-88-89-90

And after 90 comes

91-92-93-94-95-96-97-98-99 and 100

And in this activity Starry, look at the same board of numbers.

We have to read the numbers along with the colour.

We will begin with the yellow row then read the blue and then the red line, then again with the yellow in the same sequence.

Shall we begin with the first yellow row Starry!

1-11-21-31-41-51-61-71-81-91

And now the blue line

2-12-22-32-42-52-62-72-82-92

Next the red line

3-13-23-33-43-53-63-73-83-93

Now back with the yellow line Starry

4-14-24-34-44-54-64-74-84-94

The blue line again Starry

5-15-25-35-45-55-65-75-85-95

And the red line start with

6-16-26-36-46-56-66-76-86-96

Starry, the yellow line again

7-17-27-37-47-57-67-77-87-97

And the blue line begin with

8-18-28-38-48-58-68-78-88-98

The red line Starry

9-19-29-39-49-59-69-79-89-99

And the last line Starry, the yellow line, let’s read it together

10-20-30-40-50-60-70-80-90-100

And in this activity Starry, we will have some fun. We will read number along the diagonal or slanting line.

Again we have the blue, yellow and red line.

Let’s begin!

Blue 1

Yellow 2-11

Red 3-12-21

Now the blue diagonal line again: 4-13-22-31

Yellow line Starry: 5-14-23-32-41

The red line: 6-15-24-33-42-51

The blue line again: 7-16-25-34-43-52-61

Yellow line: 8-17-26-35-44-53-62-71

Red line: 9-18-27-36-45-54-63-72-81

The blue line: 10-19-28-37-46-55-64-73-82-91

The yellow line: 20-29-38-47-56-65-74-83 and 92

Starry, another red line: 30-39-48-57-66-75-84-93

The blue line has: 40-49-58-67-76-85-94

Yellow line: 50-59-68-77-86-95

Red line: 60-69-78-87-96

Blue line: 70-79-88-97

Starry the yellow line again: 80-89-98

The red line with just 2 numbers: 90-99

And finally the last line yellow with the number 100

In this last activity Starry, a star will appear with any number you have to read it aloud.

Let’s begin!

6-11-13-29-31-38-40-47-59-63-70-71-76-84-97-100

Are you happy Starry?

You have now learnt to read the numbers from 1 to 100.

BÀI 8

Hey Starry , why are you angry with me?

I know we're doing a lots of addition examples , but Starry doing addition is very useful in everyday life.

Ok I'll explain to you.

Lokio, This is the bill we got from the shop yesterday.

Let's read out the cost of items we purchase.

The cost of the water bottle is rupees 90.

We bought the six notebooks were rupees 60.

Now tell me Starry, what is written at the end of the bill?

Yes, it is written the total amount in rupees 150. So, what had we done?

Yes, the shopkeeper had added all the amount together to get the total.

So Starry, whenever we have to find the total quantity or number of items all together, we had to do addition.

Ok Starry, are you now ready to solve a few words problems.

Let's read the first problem.

Rozy's mother bought 15 chocolates and 50 toffees for her birthday.

How many sweets did she buy in all?

Starry, whenever you read a problem first write out what did given.

Can you tell me in the given problem what information is given?

Yes, it is given that Rozy's mother bought 15 chocolates and 50 toffees for her birthday.

The next step is to write what we have to find out.

Ohmm.....Here we have to find out the total number of sweets.

So Starry, which operation should be carry out?

Yes, we should do addition of 15 and 50 on adding digit.

We get 5 units and 0 units equal to 5 units. 1 ten and 5 tens equal to 6 tens.

So Starry, Rozy's mother bought 65 sweets for her birthday.

Ok Starry, let I show the next example.

A fruit seller has 65 mangoes, 36 bananas and 24 oranges in his cart.

How many fruits does he have in all? What did given here Starry?

Yes, it is given that A fruit seller has 65 mangoes, 36 bananas and 24 oranges.

What do we have to find? Yes, we have to find the total number of fruits.

So what should we do? We should add all the number of fruits.

Let's add 65 plus 36 plus 24 on adding digit.

In the unit line, we get 5 plus 6 plus 4 equal to 15 units, carry 1 ten to ten column.

Let's add the digit in the ten please.

6 plus 3 tens plus 2 tens plus 1 equal to 12 tens.. So Starry, the fruit seller has 125 fruits.

Here is the next example.

In the school, there were 42 children in standard 2A and 37 children in standard 2B.

Hence, find out the total number of children in both the classes.

So Starry, can you tell me what information is given here?

Yes, it is given 42 children in 2A and 37 children in 2B.

We have to find the total number of children in class 2.

Ok and let's add 42 and 37. 2 units plus 7 units is 9 units.

4 tens plus 3 tens is 7 tens. We got the answer 79.

So Starry, there were a total of 79 children in second standard in the school.

Hey Starry ! The next example is very easy. Come on !! Let's solve it.

Ruhi has 19 story books and her friends Tanya has 26 story books.

What is the total number of story books with them?

Yes Starry, the number of story books with Ruhi is 19 and the number of story book with Tanya is 26.

To find the total number of story books with them, we should add 19 and 26.

On adding, 9 units and 6 units we get 15 units.

Carry over 1 to ten please. Now, let's add 2 tens, 1 ten, 1 ten equal to 4 tens.

So the total number of story books with Ruhi and Tanya is 45.

Here is the last example. Let's read it first.

Karishma and her brother Sunil bought new clothes.

Karishma's dress cost rupees 575 and Sunil's shirt cost him rupees 210.

How much money did they spend in all? What's given?

The cost of Karishma's dress and the cost of Sunil's shirt.

What do we have to find? We have to find the total amount they have spent.

So Starry, can you do the addition? Yes, it's simple.

We have to arrange the 3 digit numbers in proper columns.

Now, start add the unit digit please. 5 units plus 0 unit equal to 5 units.

7 tens plus 1 ten equal to 8 tens.

And finally, 5 hundreds plus 2 hundreds equal to 7 hundreds.

So, Karishma and Sunil spent 785 rupees in all.

Did you understand Starry, how addition is useful to us in everyday life.

BÀI 9

Starry, this is a nice board, we can write or draw on this board with a marker.

Another interesting feature of this board is that it is mathematic.

Come on, let us learn addition of two digit number using this board.

See I have already draw square of 100 on this board.

Let us now see how to add 25 and 6. Yes yes Starry, the method it the same.

Using the square of 20. First we put this magic coin on the number 25.

Now move the coin ahead six squares in the same and next column. 1 2 3 4 5 6.

Which is square do we read Starry? Yes, 31. So 25 plus 6 equal 31.

Do you understand Starry? Ok, then let’s solve the next example, 57 plus 9.

Here let’s put the coin on the number 57. How many square do we have to move ahead?

Yes, 9 squares. Here we have read the number 66.

So, we can say that 57 plus 9 equal 66.

This is a lot of fun!!! Ok, now let’s look another example.

It is 5 add to 81. Where we should put the coin Starry?

Yes, we start from the square 81, now let’s move the coin ahead. 1 2 3 4 5.

That’s 81 plus 5 equal to 86. I know what are you thinking Starry.

You aren’t worry. This square can be use for adding two digit number.

This will take along time. For example if we have to add 82 to 16.

Then you know what we have to do Starry?

Yes, we have to move the coin 82 square ahead of 16.

This will take along time. So let’s use another method to do addition.

16 plus 82. First we will arrange the numbers in vertical and solve.

Write 1 in the tens place and 6 in the units place.

Next, let’s place 8 below 1 in the tens place and 2 below 6 in the units place.

First we shall add the digit in the units column 6 plus 2 equal to 8.

Next we have to add the digit in the tens place, we get 1 plus 8 equals 9.

So Starry, 16 plus 82 equals to 98. It is a more fast the method Starry!

Ok, now let’s solve the next example. Add 23 and 61. What shall we do first Starry?

We shall first arrange the numbers in proper column.

In the number 23 write 2 in the tens column and 3 in the units column. What about 63 Starry?

Yes, we write 6 below 2 in the tens place and 1 below 3 in the units place.

Now let do addition! 3 unit plus 1 unit equals to 4 unit.

2 tens plus 6 tens equals to 8 tens. So, 23 plus 61 equals to 84.

Let’s solve the next example. 40 plus 12.

We shall first arrange the numbers vertically and solve.

Now Starry, carry out there addition.

Yes, on adding digit in the units place, we get 0 plus 2 equal 2 unit.

Next 4 tens plus 1 tens equals to 5 tens. So what answer do we get Starry?

Yes, 40 plus 12 equals 52.

Remember Starry, it is not necessary to make columns for the tens and the units place to do addition each time.

But, it is necessary to write the digit in the correct places.

Let’s solve one example. Add 35 plus 52.

First we shall write the number 35, next 52 below 35 exact a way that 5 is written below 3 and 2 below 5.

Let’s add the digit in the unit place first. So 5 plus 2 equals 7 units.

Next to be add the digit in the tens place. So what is answer Starry?

Yes 3 tens plus 5 tens easy equals to 8 tens. So 35 plus 52 equals 87.

In the next example add 7 and 31. Arrange numbers vertically and solve.

Starry, do you know what be the answer it? 7 units plus 1 unit equals 8 units.

3 tens is written in the tens place. So 7 plus 31 equals 38.

Here the last example. Numbers here have been a ranked vertically.

How much is 22 plus 55 equals to?

Yes Starry, 2 units plus 5 units equals 7 units, 2 tens plus 5 tens equals to 7 tens.

         

          So 22 plus 55 equals 77.

So Starry, remember when using the vertical arrange to add p

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