07 The Cleanest Village- Textbook Solutions – Text Book Solutions All Class

Page 96 to 98

Daisy and Lou Go Shopping

Q: Daisy and Lou are very excited about their trip. They join their mother in the weekly shopping as they need to buy things for their trip. The family makes a list of things to buy:

Fruits and vegetables
Field Trip Items-Biscuits, Water Bottles, and Dry Fruits.

Sapan Dada has a cart for selling vegetables and fruits. The prices of the vegetables and fruits are given below.

Sapan Dada asks Daisy and Lou to find the costs of different quantities of fruits and vegetables. Help them to complete the tasks. You may use a number line, play money or any other method to calculate.

Ans: The amount is double.

Q: Their mother buys things for ₹163. What might she have bought? There is more than one possibility.

Ans: Since, ₹ 163 = ₹ 45 + ₹ 95 + ₹ 23 = ₹ 70 + ₹ 70 + ₹ 23
So, the mother might have bought 1 kg custard apple, 1 kg beans, and 1 kg radish or 2 kg sapota and 1 kg radish or 1 kg beans, 1 kg yam and 1 kg radish.

Q: Daisy and Lou help Udaya Didi return the balance to customers. Calculate the balance for the given transactions.

Ans:

Q: Lou and Daisy buy 3 kg bananas to eat on the way with their friends. Which of the following options can they use to buy the bananas?

Ans: Cost of 1 kg banana = ₹ 55
Cost of 3 kg banana = ₹ 55 + ₹ 55 + ₹ 55 = ₹ 165
Therefore, Lou and Daisy will choose the option (b) to by the bananas.

Page 99

A Strange Puzzle!

Q: Four kids buy two oranges each at ₹21 per orange. They pay different notes: Krishna (₹50), Sudama (₹100), Mala (₹200), Neela (₹500). What is the balance each got?

Ans: Cost for 2 oranges = 2 × ₹21 = ₹42

Krishna: Paid ₹50, Balance: ₹50 − ₹42 = ₹8
Sudama: Paid ₹100, Balance: ₹100 − ₹42 = ₹58
Mala: Paid ₹200, Balance: ₹200 − ₹42 = ₹158
Neela: Paid ₹500, Balance: ₹500 − ₹42 = ₹458

Page 100

Let Us Play

Q1: Place the numbers 1–6 in the blanks so the sum on each side of the triangle is 9. No numbers should be repeated.

Ans: Place numbers such that each side (3 numbers) sums to 9:

Vertices: 1, 2, 3; Sides: 4, 5, 6

1 + 6 + 2 = 2 + 4+ 3 = 3 + 5 + 1 = 9

Q2: Use the same numbers 1–6 and make the sum 10 on each side of the triangle.

Ans: Example: 1, 3, 5 at corners; 2, 4, 6 on sides, arranged so each side sums to 10 (e.g., 1 + 4 + 5 = 10).

1 + 4 + 5 = 5 + 2 + 3 = 3 + 6 + 1 = 10

Q3: What other sums can you make with these 6 numbers? Can you make 12 on each side? Can you make 13?

Ans:

4 + 5 + 2 = 2 + 3 + 6 = 4 + 1 + 6 = 11
Thus the other sum can we make using these numbers is 11.

4 + 3 + 5 = 5 + 1 + 6 = 6 + 2 + 4 = 12
But we cannot make 13 using numbers 1-6 on each side of the triangle without repetition of the numbers. In a magic triangle, the numbers on each side must add to the same total. To get the highest possible side sum, we place the highest numbers (6, 5, 4) at the corners. Their sum, 6 + 5 + 4 = 15. Since corner numbers are counted twice, total corner sum = 15 × 2 = 30. Now, the sum of the remaining middle numbers = 1 + 2 + 3 = 6. So, maximum total side of sum 30 + 6 = 36. Therefore, maximum possible side sum = 36 + 3 = 12. Therefore, it is impossible to create a magic triangle with a sum of 13 using numbers 1-6 on each side of the triangle without repeating the numbers.

Q: What strategy did you use to place the numbers?
Ans: Start with the smallest or largest numbers at corners, then adjust side numbers to balance the sum. Check each side’s sum and swap numbers if needed to ensure equality.

Page 101Add UpQ1: Estimate the number of teachers going. How many teachers are accompanying the children?
Ans:

Estimate: 24 + 28 ≈ 20 + 30 = 50 teachers.
Exact: 24 + 28 = 52 teachers.

Q2: How many children are going on the trip? Estimate the number of children.

Ans:

Exact: 438 (from school) + 476 (neighbourhood school) = 914 children.
Estimate: 438 ≈ 400, 476 ≈ 500, so 400 + 500 = 900 children.

Page 103

Daisy and Lou’s Spending

Q: Daisy and Lou ate one large piece of pusaw for ₹38. They liked it a lot and bought another small piece for ₹ 16. How much did they spend on pusaw?

Ans: ₹38 + ₹16 = ₹54

Page 104Daisy and Lou’s Piggy BankQ: Daisy and Lou had collected ₹ 185 in their piggy bank. Their mother gave them ₹ 125 more for the trip. How much money did they take for the trip?

Ans:

Daisy and Lou took ₹ 310 for the trip.

Page 105

Let Us Do

Q1: In Kalakshitij, a school of performing arts, the following number of students are learning to sing and play the tabla. Estimate and then find the total number of students.

15 more girls join the music school and they want to learn to play the tabla. How many girls play the tabla now?

Ans:

Boys: 78 (Tabla) + 532 (Singers) = 610
Girls: 95 (Tabla) + 346 (Singers) = 441
Total Tabla: 78 + 95 = 173
Total Singers: 532 + 346 = 878
Total Students: 610 + 441 = 1051
Estimate: 78 ≈ 80, 532 ≈ 500, 95 ≈ 100, 346 ≈ 350; Total ≈ 80 + 500 + 100 + 350 = 1030
New tabla girls: 95 + 15 = 110

Q2: Add by aligning the numbers in columns.

a) 32 + 47
Ans: 79b) 654 + 95
Ans: 749c) 286 + 123
Ans: 409d) 476 + 324
Ans: 800e) 700 + 289
Ans: 989f) 534 + 483
Ans: 1017

Q3: Preeti’s school has 423 children. Her school has 178 less than her cousin’s school. How many children in Preeti’s cousin’s school?

Ans: Preeti’s cousin’s school has 178 children more than Preeti’s school.
So, number of children in Preeti’s cousin’s school = 423 + 178 = 601 children

Page 108 & 110

Let Us Solve

Q1: Ram Chacha got 264 mangoes from his mango tree last year. This year he got 527 mangoes. How many more mangoes did he get this year?

Ans:

Thus, this year Ram Chacha got 263 more mangoes than previous year.

Q2: During the festival of dolls (Gombe Habba in Dussehra), Ranganna made 639 dolls. He was able to sell 531 dolls. How many dolls are left with him?
Ans:

No. of dolls left = 639 – 531 = 108.

Q3: Subtract by aligning the numbers in columns.
a) 83 − 29
Ans:b) 345 − 123
Ans:

c) 763 − 437
Ans:

d) 803 − 350
Ans:

e) 900 − 328
Ans:

Page 109

Let Us Solve

Q1. These books are in the community library of Wakanda village. Children borrow these books to read during their vacation.

a) Rami read Panchatantra Tales during the summer vacation. Kesu read Akbar Birbal, Karadi Tales and Blue Umbrella. Who do you think read more? How many more pages?

Ans: Rami read: Panchatantra Tales = 236 pages

Kesu read:
- Akbar Birbal = 96 pages
- Karadi Tales = 30 pages
- Blue Umbrella = 90 pages
- Total = 96 + 30 + 90 = 216 pages

Rami read more pages.

Rami read more. She read 20 pages more than Kesu.

b) Sumi read 23 pages of Adventures of Feluda. How many more pages to complete?

Ans: Total pages in Adventures of Feluda = 128

Pages read = 23

Pages left = 128 – 23 = 105

c) Jaggu finished Swami and Friends, Akbar Birbal, and 50 pages of Feluda. How many more pages to finish all books?

Ans: Total pages = 179 + 236 + 30 + 96 + 90 + 128 = 759 pages

Pages Jaggu has read:

Swami and Friends = 179
Akbar Birbal = 96
Feluda = 50
Total read = 179 + 96 + 50 = 325 pages

Pages left = 759 – 325 = 434 pages

Page 110

Train Between Delhi and Aligarh

Q2: A daily train between Delhi and Aligarh travels a distance of 131 km. Look at the picture below and answer the questions that follow.

a) How many passengers are there on the train when it leaves Dadri?
Passengers boarded at New Delhi = 894
Passengers boarded at Ghaziabad = 158
Passengers alighted at Ghaziabad = 23
Passengers boarded at Dadri = 67
Passengers alighted at Dadri = 75

Total passengers after Dadri = 894 + 158 – 23 + 67 – 75 = 1021

Answer: 1021 passengers

b) Find the number of people who got off the train at Aligarh.
The train had 1021 passengers after leaving Dadri. If all the remaining passengers got off at Aligarh, then:
Answer: 1021 people

c) Were there more people on the train in New Delhi or in Aligarh? How much more/less?
Passengers in New Delhi = 894
Passengers in Aligarh = 1021

1021 – 894 = 127 more passengers in New Delhi

Answer: There were 127 more people on the train in New Delhi than in Aligarh.

d) How many people travelled altogether by the train?
Total passengers who boarded:
New Delhi = 894
Ghaziabad = 158
Dadri = 67

Total = 894 + 158 + 67 = 1119

Answer: 1119 people travelled altogether by the train.

Page 111

Let Us Solve

Solve:
Ans:

c) Find quick ways of solving. Think about some of the strategies you learnt in Grade 3.

Ans:

d)Solve by aligning the numbers in columns in your notebook.
1. 38 + 943
Ans:

2. 465 + 305
Ans:

3. 435 + 462
Ans:

4. 764 – 657
Ans:

5. 518 – 209
Ans:

6. 879 – 53
Ans:

e) Find two numbers such that their sum is 856. Find another two numbers such that their difference is 563. Make your own word problems with these numbers.

Ans:

Page 112

Number Pair Hunt

Here is a grid of numbers. There are many number pairs in this grid. A number pair has 2 numbers which are next to each other, vertically or horizontally. For example, the numbers 111 and 185 are number pairs 48 and 185 are number pairs in this grid.