Page 96
Fruit Shop - Observe the picture and answer the following questions
-
1. How many apples are there in the shop?
How many rows of apples are there? = 2 rows
How many apples are there in each row? = 8 apples
Total Number of apples = 2 × 8 = 16 applesTotal Number of apples = 16 -
2. The price of apples is how many times to the price of mangoes?
Price of 1 kg Apples = ₹120
Price of 1 kg Mangoes = ₹60
120 ÷ 60 = 2 times
Answer: 2 times -
3. If you want to buy two dozens of bananas in the shop, how much money you need to pay to the fruit seller?
Price of 1 dozen bananas = ₹25
Cost of 2 dozens = 2 × 25 = ₹50 -
4. To buy 3 kgs of mangoes and 1 kg of apples, how much money do you need to pay to the shopkeeper?
Cost of 3 kgs of mangoes = 3 × 60 = ₹180
Cost of 1 kg of apples = 1 × 120 = ₹120
Total money to pay = 180 + 120 = ₹300
Page 98
Math Game - Identify the number cards inside each of the envelope
| Envelope Number / Value | Ans (Number Cards) | Multiplication Check |
|---|---|---|
| Envelope 1 (Value: 7) | 1 and 7 | 1 × 7 = 7 |
| Envelope 2 (Value: 18) | 2 and 9 (or 3 and 6) | 2 × 9 = 18 |
| Envelope 3 (Value: 32) | 4 and 8 | 4 × 8 = 32 |
| Envelope 4 (Value: 20) | 2 and 10 (or 4 and 5) | 2 × 10 = 20 |
| Envelope 5 (Value: 45) | 5 and 9 | 5 × 9 = 45 |
Page 100
Do these
-
1. Do the following.
a) T O
1 4
× 342 -
b) T O
1 2
× 560 -
c) T O
1 3
× 452
In 21 × 2 = 42
-
Which one is multiplicand?
Answer = 21
-
Which one is multiplier?
Answer = 2
-
Which one is product?
Answer = 42
Page 102
Word Problems
-
2. Karthik have 4 packets. There are 24 crackers in each packet. How many crackers will be in 4 such packets?
Crackers in each packet = 24
Number of packets = × 4
Total number of crackers = 96 -
3. There are 12 bananas in a bag. Find the number of bananas in 5 such bags.
Number of bananas in each bag = 12
Number of bags = × 5
Total number of bananas = 60 -
Example: There are 32 coconuts in a bag. How many coconuts are there in 4 such bags?
Number of coconuts in a bag = 32
Number of bags = 4
Total number of coconuts in all bags = 32 × 4 = (30 + 2) × 4 = (30 × 4) + (2 × 4) = 120 + 8 = 128 coconuts
Page 104
Do these
-
1. Do the following.
a) 86 × 2 = 172
b) 64 × 3 = 192
c) 45 × 5 = 225
d) 58 × 4 = 232 -
2. There are 50 books in a box. Find the total number of books in such 4 boxes?
Number of books in each box = 50
Number of boxes = × 4
Total number of books = 200 -
3. Cost of a pen is ₹4. What is the cost of 32 pens?
Cost of 1 pen = ₹4
Cost of 32 pens = 32 × 4 = ₹128
Math Lab Activity: Complete the 5 table using sticks
- 1 × 5 = 5
- 2 × 5 = 10
- 3 × 5 = 15
- 4 × 5 = 20
- 5 × 5 = 25
- 6 × 5 = 30
- 7 × 5 = 35
- 8 × 5 = 40
- 9 × 5 = 45
- 10 × 5 = 50
Page 106
Formation of Tables
-
3 × 6 read as 3 times 6 i.e. 6 × 3 = 18
We can say that 3 × 6 = 6 × 3 = 18
Add table 6 and table 3 for making table 9
| Table 6 | 6 | 12 | 18 | 24 | 30 | 36 | 42 | 48 | 54 | 60 |
|---|---|---|---|---|---|---|---|---|---|---|
| Table 3 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 |
| Table 9 | 9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 | 90 |
Page 108
Observe the pattern
- 6 × 9 = 54 (5 + 4 = 9)
- 7 × 9 = 63 (6 + 3 = 9)
- 8 × 9 = 72 (7 + 2 = 9)
- 9 × 9 = 81 (8 + 1 = 9)
- 10 × 9 = 90 (9 + 0 = 9)
Do these: Table Formation
-
1. Make the table of 7 by using Table 5 and Table 2.
Table 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50
Table 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Table 7 (5+2): 7, 14, 21, 28, 35, 42, 49, 56, 63, 70 -
2. Make table 9 by using Table 7 and Table 2.
Table 7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70
Table 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Table 9 (7+2): 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 -
3. Make the table of 8 by taking any two tables of your choice. (Using Table 5 and Table 3)
Table 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50
Table 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Table 8 (5+3): 8, 16, 24, 32, 40, 48, 56, 64, 72, 80
Multiply by 10's: A packet contains 10 pencils
- (a) How many pencils do 2 packets have? 2 × 10 = 20
- (b) How many pencils do 3 packets have? 3 × 10 = 30
- (c) How many pencils do 4 packets have? 4 × 10 = 40
- (d) How many pencils do 8 packets have? 8 × 10 = 80
- (e) How many pencils do 10 packets have? 10 × 10 = 100
- (f) How many pencils do 14 packets have? 14 × 10 = 140
- (g) How many pencils do 26 packets have? 26 × 10 = 260
- (h) How many pencils do 57 packets have? 57 × 10 = 570
Page 110
Do these: Multiply by 10
- 1. 34 × 10 = 340 | 10 × 34 = 340
- 2. 80 × 10 = 800 | 10 × 80 = 800
- 3. 48 × 10 = 480 | 10 × 48 = 480
- 4. 85 × 10 = 850 | 10 × 85 = 850
- 5. 10 × 90 = 900 | 90 × 10 = 900
Observe the pattern and fill in the blanks
| Column 1 (× 20) | Column 2 (× 30) | Column 3 (× 40) |
|---|---|---|
| 6 × 20 = 120 | 6 × 30 = 180 | 6 × 40 = 240 |
| 7 × 20 = 140 | 7 × 30 = 210 | 7 × 40 = 280 |
| 8 × 20 = 160 | 8 × 30 = 240 | 8 × 40 = 320 |
| 9 × 20 = 180 | 9 × 30 = 270 | 9 × 40 = 360 |
| 10 × 20 = 200 | 10 × 30 = 300 | 10 × 40 = 400 |
| 11 × 20 = 220 | 11 × 30 = 330 | 11 × 40 = 440 |
| 12 × 20 = 240 | 12 × 30 = 360 | 12 × 40 = 480 |
Page 112
EXERCISE-1
1. Write multiplicand, multiplier and product in the following multiplications.
-
a) 72 × 4 = 288
Multiplicand = 72 ; Multiplier = 4 ; Product = 288
-
b) 5 × 100 = 500
Multiplicand = 5 ; Multiplier = 100 ; Product = 500
2. Find the product.
- a) 75 × 2 = 150
- b) 95 × 4 = 380
- c) 70 × 8 = 560
- d) 93 × 9 = 837
- e) 64 × 8 = 512
- f) 96 × 10 = 960
3. Prepare the tables.
-
a) Prepare the table for 5 using the tables 2 and 3.
Table 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Table 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Table 5 (2+3): 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 -
b) Prepare the table for 10 using the table 6 and 4.
Table 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60
Table 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40
Table 10 (6+4): 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 -
c) Prepare the table for 9 using the table 5 and 4.
Table 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50
Table 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40
Table 9 (5+4): 9, 18, 27, 36, 45, 54, 63, 72, 81, 90
4. Solve the following.
-
a) The price of one pencil is ₹6. What is the cost of 72 pencils ?
Cost of 1 pencil = ₹6
Cost of 72 pencils = 72 × 6 = ₹432 -
b) In an orchard, there are 10 rows of mango trees and each row contains 25 trees. How many mango trees are there in total?
Number of rows = 10
Trees in each row = 25
Total mango trees = 10 × 25 = 250 trees -
5. Rajesh bought 5 bags of oranges at a store. There were 9 oranges in each bag. How many oranges did Rajesh have now? Which set of Mathematical sentence could be used to solve this problem?
Answer: c) 5 × 9 = 45 (or) 9 + 9 + 9 + 9 + 9 = 45
Page 116
Example
-
72 people can sit in one compartment of a train. How many people can sit in a train, with 23 such compartments?
Capacity of the compartment to sit = 72
Number of compartments = × 23
Step 1 (72 × 3) = 216
Step 2 (72 × 20) = 1440
Total number of people = 1656
Page 118
Do these
-
1. Do the following.
a) Th H T O
7 1
× 2 471 × 24 = 1704 -
b) Th H T O
4 5
× 3 845 × 38 = 1710 -
c) Th H T O
9 5
× 4 295 × 42 = 3990 -
2. 48 people can travel in a bus. How many people can travel in 26 such buses?
Number of people in 1 bus = 48
Number of buses = 26
Total people = 48 × 26 = 1248 people -
3. In a library there are 48 cupboards. In each cupboard, there are 63 books. How many books are there in the library?
Number of cupboards = 48
Books in each cupboard = 63
Total books = 48 × 63 = 3024 books
Page 120
Do these
-
1. Do the following.
a) H T O
1 2 2
× 4488 -
b) H T O
1 4 0
× 2280 -
c) H T O
2 2 1
× 3663 -
d) H T O
1 1 1
× 9999 -
2. A book contains 130 pages. Total how many pages are there in 3 such books?
Pages in 1 book = 130
Pages in 3 books = 130 × 3 = 390 pages -
3. A bag costs ₹300. How much money will be paid to buy 2 bags?
Cost of 1 bag = ₹300
Cost of 2 bags = 300 × 2 = ₹600 -
4. There are 2 boxes and in each box there are 142 balls. How many balls are there in total?
Number of boxes = 2
Balls in each box = 142
Total balls = 142 × 2 = 284 balls
Page 122
Just estimate! Can you estimate closest to the products?
-
1. There are 26 mangoes in each basket. How many mangoes will be there in 19 such baskets? (Options: ₹460, 480, 500)
Estimated closest value: 500 (26 × 19 ≈ 25 × 20 = 500; Exact = 494)
-
2. The cost of each movie ticket is ₹25. If 28 students of a class go to watch the movie, how much money they have to pay for the tickets? (Options: ₹800, ₹750, ₹900)
Estimated closest value: ₹750 (25 × 28 ≈ 25 × 30 = 750; Exact = ₹700)
-
3. Siva wants to plant some plants in his field. He wants to plant in 26 rows. If each row contains 27 plants, how many plants should he buy? (Options: 600, 780, 900)
Estimated closest value: 780 (26 × 27 ≈ 26 × 30 = 780; Exact = 702)
-
4. The cost of a folding chair is ₹175. What is the cost of 5 such folding chairs? (Options: ₹500, ₹1000, ₹1500)
Estimated closest value: ₹1000 (175 × 5 ≈ 200 × 5 = 1000; Exact = ₹875)
Page 124
EXERCISE-2
1. Multiply.
-
a) H T O
1 2
× 9108 -
b) H T O
4 2
× 1 9798 -
c) H T O
4 1 4
× 2828
2. Fill in the blanks.
- a) 67 × 5 = 335
- b) 93 × 4 = 372
- c) 123 × 3 = 369
Word Problems
-
3. There are 36 beads in a necklace. How many beads are there in 13 necklaces?
Beads in 1 necklace = 36
Total necklaces = 13
Total beads = 36 × 13 = 468 beads -
4. If there are 48 bottles in one carton, how many bottles are there in 16 cartons?
Bottles in 1 carton = 48
Total cartons = 16
Total bottles = 48 × 16 = 768 bottles -
5. There are 54 chikkis in one plate. If, there are 44 such plates, how many chikkis are there?
Chikkis in 1 plate = 54
Total plates = 44
Total chikkis = 54 × 44 = 2376 chikkis -
6. Cost of a dictionary is ₹120. How much money has to pay for 4 dictionaries?
Cost of 1 dictionary = ₹120
Cost of 4 dictionaries = 120 × 4 = ₹480 -
7. 5 students of a class collected ₹110 each for the Prime Minister's relief fund. How much money did they collect altogether?
Number of students = 5
Amount from each student = ₹110
Total money collected = 110 × 5 = ₹550 -
8. Observe the picture below. What is the missing number in the multiplication equation represented in the picture? [ ] × 6 = 30
Answer: a) 5 (5 × 6 = 30)
Page 126
Improve your Learning
-
1. 89 × [ ] = 89. What is the missing number in the blank?
Answer: b) 1
-
2. Rama solved a math problem. 5 [ ] 5 = 25. Which mathematical symbol should be placed in the blank to make the statement correct?
Answer: c) ×
-
3. Observe the given pattern: 16, 32, 64, what should be done to find the next number?
Answer: b) Multiply 64 with 2
-
4. Observe the apples on the plates given below. If 4 apples are in the plate, how many apples will be in 4 plates. The multiplication form:
Answer: c) 4 × 4 = 16
-
5. Krishna got the answer 19 × 5 = 85. Ravi got the answer 19 × 5 = 95. Whom do you agree with? Do the solution and decide.
19 × 5 = (10 + 9) × 5 = 50 + 45 = 95
Answer: I agree with Ravi. -
6. Make a word problem using 24 × 3. Solve it. (Note: 24 trees in a row, 3 rows)
Word Problem: In an orchard, there are 3 rows of trees. If each row has 24 trees, how many trees are there in total?
Solution: Total trees = 24 × 3 = 72 trees. -
7. Ranjani has 27 flowers and needs to put 3 flowers in each vase. How many vases does she need?
Total flowers = 27
Flowers in each vase = 3
Number of vases needed = 27 ÷ 3 = 9 vases (Since 9 × 3 = 27) -
8. Sneha put exactly 15 balls in each of the basket shown below. Find out the total number of balls she put in all the baskets?
Balls in each basket = 15
Number of baskets = 4
Total number of balls = 15 × 4 = 60 balls