Chapter 9 – How Many Times?

Page No 122:

Question 1:

How many spiders? _________ One spider has _________ legs. In all, spider legs are 3 times ________ or    +    +    = ________ or 3 × ______ = ________

Answer:

There are 3 spiders. One spider has 8 legs. In all, spider legs are 3 times  8 . or  8 +  8 + 8 =  24 . or 3 ×  8  =  24 .

Question 2:

Do you know this leggy fellow? This is an octopus. It lives in the sea. It also has 8 legs. So how many legs altogether do 5 octopuses have? +    +    +    +    = ________ or 5 times ________ = ________ or 5 × _______ = ________

Answer:

8 + 8 + 8 + 8 + 8 = 40 or 5 times  8  = 40 or 5 × 8 = 40

Page No 123:

Question 1:

In the same way, how many bottles are these? ______ times ______ = ______ bottles

Answer:

There are 5 rows. Each row has 4 bottles. 5 times 4 = 20 bottles

Question 2:

How many eggs? _____ times _____ = _____ eggs 

Answer:

There are 5 rows and each row has 6 eggs. 5 times  6 =  30  eggs

Page No 124:

Question 1:

Rewrite using the + sign. 2 × 5 is 2 times 5    or    5 + 5 4 × 18 is 4 times _____  or  _____ + _____ + _____ + _____ 3 × 20 is _____ times _____   or  _____ + _____ + _____ 8 × 9 is _____ times _____  or  _____ + _____ + _____ + _____ + _____ + _____ + _____ + _____

Answer:

4 × 18 is 4 times 18   or   18 + 18 + 18 + 18 3 × 20 is 3 times 20   or   20 + 20 + 20 8 × 9 is 8 times 9       or    9 + 9 + 9 + 9 + 9 + 9 + 9 + 9

Question 2:

Tell how many times!

9 + 9 + 9 + 9 + 9 + 9	= 6 × 9	= 54
4 + 4 + 4 + 4 + 4	= 5 × 4	= 20
8 + 8 + 8	=____ × 8	= ____
3 + 3 + 3 + 3 + 3	= 5 × ____	= ____
30 + 30 + 30	= ____ × ____	= ____
7 + 7 + 7 + 7 + 7 + 7	= ____ × ____	= ____
12 + 12 + 12 + 12	= ____ × 12	= ____
6 + 6 + 6	= ____ × ____	= ____
10 + 10 + 10 + 10	= ____ × ____	= ____
2 + 2 + 2 + 2 + 2	= ____ × ____	= ____
6 + 6 + 6 + 6 + 6 + 6 + 6	= ____ × ____	= ____

Answer:

9 + 9 + 9 + 9 + 9 + 9	= 6 × 9	= 54
4 + 4 + 4 + 4 + 4	= 5 × 4	= 20
8 + 8 + 8	= 3 × 8	= 24
3 + 3 + 3 + 3 + 3	= 5 × 3	= 15
30 + 30 + 30	= 3 × 30	= 90
7 + 7 + 7 + 7 + 7 + 7	= 6 × 7	= 42
12 + 12 + 12 + 12	= 4 × 12	= 48
6 + 6 + 6	= 3 × 6	= 18
10 + 10 + 10 + 10	= 4 × 10	= 40
2 + 2 + 2 + 2 + 2	= 5 × 2	= 10
6 + 6 + 6 + 6 + 6 + 6 + 6	= 7 × 6	= 42

Page No 125:

Question 1:

Ramu bought 4 packets of biscuits. Each packet has 4 biscuits. How many biscuits did Ramu buy?

Answer:

Ramu bought 4 packets of biscuits. Each packet has 4 biscuits. Total biscuits that Ramu bought = 4

×4 = 16 Ramu bought 16 biscuits.

Question 2:

There are 12 desks in a classroom. Each desk has 4 legs. What is the total number of legs of the desks?

Answer:

Number of desks in a classroom = 12 Each desk has 4 legs. Total number of legs = 12

×4 = 48 The desks have 48 legs.

Question 3:

Sabiha brought home 3 bunches of flowers. Each bunch has 4 flowers. How many flowers were there?

Answer:

Sabiha brought 3 bunches of flowers. Each bunch has 4 flowers. Total number of flowers = 3

×4 = 12 There were 12 flowers.

Question 4:

One rail coach has 8 wheels. How many wheels in all in 6 coaches?

Answer:

Number of wheels in one rail coach = 8 Number of coaches = 6 Total number of wheels = 6

×8 = 48 There are 48 wheels in 6 coaches.

Page No 126:

Question 1:

How Many Times 2? 

1 time 2	is 2	or 1 × 2	= 2
2 times 2	is 4	or 2 × 2	= 4
3 times 2	is 6	or 3 × 2	= 6
4 times 2	is _____	or 4 × 2	= _____
5 times 2	is _____	or 5 × 2	= _____
6 times 2	is _____	or 6 × 2	= _____
_____ times 2	is _____	or _____ × 2	= _____
_____ times _____	is _____	or 8 × 2	= _____
_____ times _____	is _____	or 9 × 2	= _____
_____ times _____	is _____	or 10 × 2	= _____

Answer:

1 time 2	is 2	or 1 × 2	= 2
2 times 2	is 4	or 2 × 2	= 4
3 times 2	is 6	or 3 × 2	= 6
4 times 2	is 8	or 4 × 2	= 8
5 times 2	is 10	or 5 × 2	= 10
6 times 2	is 12	or 6 × 2	= 12
7 times 2	is 14	or 7 × 2	= 14
8 times 2	is 16	or 8 × 2	= 16
9 times 2	is 18	or 9 × 2	= 18
10 times 2	is 20	or 10 × 2	= 20

Page No 127:

Question 1:

Jump with Me Tarru Frog jumps 3 steps each time. Which numbers will Tarru touch?

Answer:

Page No 128:

Question 1:

Show jumps with 4 steps

Answer:

Page No 129:

Question 1:

Try jumps with seven steps

Answer:

Page No 130:

Question 1:

Let’s try making a 2 times table with sticks:

 1 × 2 = 2 2 × 2 = 4 3 × 2 = 6 4 × 2 = 5 × 2 = 6 × 2 = 7 × 2 = 8 × 2 = 9 × 2 = 10 × 2 =

Answer:

4 × 2 =   8 5 × 2 = 10 6 × 2 = 12 7 × 2 = 14 8 × 2 = 16 9 × 2 = 18 10 × 2 = 20

Page No 131:

Question 1:

Now draw sticks to make the multiplication table of 6:

Answer:

Question 2:

Shopping with Tables How much do these things cost?

4 toffees cost ________ rupees. 

3 pencil boxes cost ________ rupees. 10 pencil boxes cost ________ rupees. 

9 balloons cost ________ rupees.  5 toys cost ________ rupees.  7 face masks cost ________ rupees. 

Answer:

Number of toffees = 4 Each toffee costs Rs 2. Total cost = 4

×2 = 8 4 toffees cost 8 rupees.

Number of pencil boxes = 3 Each pencil box costs Rs 10. Total cost = 3

×10 = 30 3 pencil boxes cost 30 rupees.

Total cost of 10 pencil boxes = 10

×10 = 100 10 pencil boxes cost 100 rupees.

Number of balloons = 9 Each balloon costs Rs 5. Total cost = 9

×5 = 45 9 balloons cost 45 rupees.

Number of toys = 5 Each toy costs Rs 4. Total cost = 5

×4 = 20 5 toys cost 20 rupees.

Number of face masks = 7 Each face mask costs Rs 3. Total cost = 7

×3 = 21 7 face masks cost 21 rupees.

Page No 132:

Question 1:

Practice Time Complete the following: 2 × 7 = __________ 4 × 9 = __________ 5 × 8 = __________ 10 × 6 = __________ 5 × 9 = __________ 3 × 9 = __________ 5 × 2 = __________ 3 × 10 = __________ 2 × 8 = ___________ 10 × 8 = ___________

Answer:

2 × 7   = 14 4 × 9   = 36 5 × 8   = 40 10 × 6   = 60 5 × 9   = 45 3 × 9   = 27 5 × 2   = 10 3 × 10 = 30 2 × 8   = 16 10 × 8   = 80

Question 2:

Look at the patterns and complete them. 3, 6, 9, _________, _________, _________. 2, 4, 6, _________, _________, _________. 10, 20, 30, _________, _________, _________. 4, 8, 12, _________, _________, _________. 5, 10, 15, _________, _________, _________. 30, 60, 90, _________, _________, _________.

Answer:

3, 6, 9, 12, 15, 18. 2, 4, 6, 8, 10, 12. 10, 20, 30, 40, 50, 60. 4, 8, 12, 16, 20, 24. 5, 10, 15, 20, 25, 30. 30, 60, 90, 120, 150, 180.

Page No 133:

Question 1:

Complete the multiplication tree

Answer:

Page No 134:

Question 1:

How many in all?

• A shirt has 5 buttons. How many buttons would 3 shirts have? 

• There are four fans. Each fan has 3 blades. What is the total number of blades in all? 

• A box contains 6 apples. How many apples in all will seven boxes have? 

• How many corners would 4 triangles have? 

Answer:

There are 3 shirts. Each shirt has 5 buttons. Total number of buttons = 3

×5 = 15 3 shirts will have 15 buttons.

There are 4 fans. Each fan has 3 blades. Total number of blades = 4

×3 = 12 There are 12 blades in all.

There are 7 boxes. Each box has 6 apples. Total number of apples = 7

×6 = 42 Seven boxes will have 42 apples.

There are 4 triangles. Each triangle has 3 corners. Total number of corners = 4

×3 = 12 There would be 12 corners in 4 triangles.

Question 2:

Some multiplication fats: • 8 × 3 = _____ • 3 × ____ = _____ • ____ × ____ =  42  • 5 × ____ =  40   • ____ × ____ =   54   • 5 × ____ = 357 • ____ × 6 = 36 • 10 × ____ = _____ • ____ × 9 = 36 • ____ × 7 = 28

Answer:

• 8 × 3 = 24 • 3 × 7 = 21 • 7 × 6 = 42 • 5 × 8 = 40 • 6 × 9 = 54 • 5 × 7 = 35 • 6 × 6 = 36 • 10 × 8 = 80 • 4 × 9 = 36 • 4 × 7 = 28

Page No 135:

Question 1:

Multiplication Table of 1

one time one is	1 × 1 =	1
two times one is	2 × 1 =	2
three times one is	3 × __	= ____
four times one is	__ × __	= ____
_____ times one is	__ × __	=   ____
_____ times one is	__ × __	=   ____
_____ times one is	__ × __	=   ____
_____ times one is	__ × __	=   ____

Answer:

one time one is	1 × 1 =	1
two times one is	2 × 1 =	2
three times one is	3 × 1	= 3
four times one is	4 × 1	= 4
five times one is	5 × 1	=  5
six times one is	6 × 1	=  6
seven times one is	7 × 1	=  7
eight times one is	8 × 1	=  8

Page No 138:

Question 1:

Multiply:

• 22 × 3 =	• 43 × 2 =
• 21 × 4 =	• 24 × 2 =
• 11 × 5 =	• 30 × 5 =
• 20 × 4 =	• 23 × 9 =
• 26 × 4 =	• 38 × 2 =
• 25 × 3 =	• 24 × 5 =
• 35 × 3 =	• 48 × 4 =
• 32 × 5 =	• 58 × 2 =

Answer:

• 22 × 3 = 66	• 43 × 2 = 86
• 21 × 4 = 84	• 24 × 2 = 48
• 11 × 5 = 55	• 30 × 5 =150
• 20 × 4 = 80	• 23 × 9 = 207
• 26 × 4 = 104	• 38 × 2 = 76
• 25 × 3 = 75	• 24 × 5 = 120
• 35 × 3 = 105	• 48 × 4 = 192
• 32 × 5 = 160	• 58 × 2 = 116

Question 2:

First guess the answer and then calculate: • A flower has five petals. A bunch of flowers has 13 flowers. How many petals are there in the bunch? 

• A book has 64 pages. What will be the total number of pages in 8 such books? 

• Students stand in rows in the assembly. There are six rows of students. Each row has 17 students. How many students are there? 

• A design has 3 flowers in it. A piece of cloth has 17 such designs. How many flowers will be on the cloth? 

Answer:

• Number of flowers in one bunch = 13 Each flower has 5 petals. Total petals in the bunch = 13

×5

Adding the number in the boxes: 

So, 13

×5 = 65

Thus, there are 65 petals in a bunch.

• Number of books = 8 Each book has 64 pages. Total pages in 8 books = 8

×64

Adding the number in the boxes:

So, 8

×64 = 512

There are 512 pages in all the 8 books.

• Number of rows in assembly = 6 Each row has 17 students. Total students in 6 rows = 6

×17

Adding the number in the boxes: 

So, 6

×17 = 102

There are 102 students in all the 6 rows.

• Number of designs on a piece of cloth = 17 Each design has 3 flowers in  it. Total number of flowers on the cloth = 17

×3

Adding the number in the boxes:

So, 17

×3 = 51

There are 51 flowers on the cloth.

Page No 141:

Question 1:

Practice Time First guess the answer and then check it by calculating:

42 × 23 = _________ 51 × 13 = _________ 25 × 36 = _________ 73 × 11 = _________ 54 × 12 = _________ 12 × 14 = _________

Answer:

a)

Adding the number in the boxes:

So, 42 × 23 = 966

b)

Adding the number in the boxes:

So, 51 × 13 = 663

c)

Adding the number in the boxes: 

So, 25 × 36 = 900

d)

Adding the numbers in the boxes:

So, 73 × 11 = 803

e)

Adding the number in the boxes:

So, 54 × 12 = 648

f)

Adding the number in the boxes:

So, 12 × 14 = 168

Question 2:

Multiplication Patterns

9 × 1 = 9
9 × 2 = 18	1 + 8 = 9
9 × 3 = 27	2 + 7 = 9
9 × 4 = 36	3 + 6 = 9
9 × 5 = 45	4 + 5 = 9
9 × __ = __	__ + __ = __
9 × __ = __	__ + __ = __
9 × 8 = __	__ + __ = __

Did you see the pattern in the 9 times table? What numbers are adding up to 9?

Answer:

The multiplication pattern is explained in the table given below. Ones digit of all the numbers are in descending order i.e. 8, 7, 6, 5, 4, 3, 2, 1. And, the tens digit are the numbers in ascending order i.e. 1, 2, 3, 4, 5, 6, 7, 8. Ones digit number and tens digit number adds to 9.

9 × 1 = 9
9 × 2 = 18	1 + 8 = 9
9 × 3 = 27	2 + 7 = 9
9 × 4 = 36	3 + 6 = 9
9 × 5 = 45	4 + 5 = 9
9 × 6 = 54	5 + 4 = 9
9 × 7 = 63	6 + 3 = 9
9 × 8 = 72	7 + 2 = 9
9 × 9 = 81	8 + 1 = 9

Page No 142:

Question 1:

Complete the grid by multiplying the numbers 

Answer:

Page No 143:

Question 1:

• Mark the numbers 1-10 in the same grid in one colour. • Mark the numbers 12-20 in another colour. • Similarly mark 21-30 in a third colour. Do you see any colour pattern?

Answer:

No, we cannot see any colour pattern.

Question 2:

Fill this space with your favourite multiplication table.

Answer:

Disclaimer: The answer may vary from student to student. Students are required to answer the question on their own

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