The DAV Class 6 Maths Book Solutions Pdf and DAV Class 6 Maths Chapter 1 Worksheet 9 Solutions of Natural Numbers and Whole Numbers offer comprehensive answers to textbook questions.
DAV Class 6 Maths Ch 1 WS 9 Solutions
Simplify the following numerical expressions.
Question 1.
25 + 14 ÷ (5 – 3)
Solution:
25 + 14 ÷ (5 – 3)
= 25 + 14 ÷ 2
= 25 + 7
= 32
Question 2.
3 – (5 – 6 ÷ 3)
Solution:
3 – (5 – 6 ÷ 3)
= 3 – (5 – 2)
= 3 – 3
= 0
Question 3.
36 – [12 + (3 × 10 ÷ 2)]
Solution:
36 – [12 + (3 × 10 ÷ 2)]
= 36 – [12 + (3 × 5)]
= 36 – [12 + 15]
= 36 – 27
= 9
Question 4.
20 – 3 – [7 – [2 + (4 – 3)]]
Solution:
20 – 3 – [7 – [2 + (4 – 3}]
= 20 – 3 – [7 – {2 + 1)}]
= 20 – 3 – [7 – 3]
= 20 – 3 – 4
= 20 – 7
= 13
Question 5.
15 + [18 – [4 + (16 – 5)}]
Solution:
15 + [18 – {4 + (16 – 5)}]
= 15 + [18 – {4 + 11}]
= 15 + [18 – 15]
= 15 + 3
= 18
Question 6.
22 – \(\frac{1}{4}\) {16 – (8 ÷ 4 + 2)}
Solution:
22 – \(\frac{1}{4}\) {16 – (8 ÷ 4 + 2)}
= 22 – \(\frac{1}{4}\) {16 – (2 + 2)}
= 22 – \(\frac{1}{4}\) {16 – 4}
= 22 – \(\frac{1}{4}\) × 12
= 22 – 3
= 19
Question 7.
18 – [18 – [18 – (18 – 18) – 18]]
Solution:
18 – [18 – [18 – (18 – 18) – 18}]
= 18 – [18 – [18 – 0 – 18}]
= 18 – [18 – 0]
= 18 – 18
= 0
Question 8.
150 – [70 – {60 – (30 + 20)} – 10]
Solution:
150 – [70 – {60 – (30 + 20)} – 10]
= 150 – [70 – {60 – 50} – 10]
= 150 – [70 – 10 – 10]
= 150 – [70 – 20]
= 150 – 50
= 100
DAV Class 6 Maths Chapter 1 Value Based Questions
Question 1.
Members of an NGO decided to provide blankets to an old age home. For this purpose a sum of ₹ 8435 was collected and 35 blankets were purchased. The old people were very happy with the blankets. They blessed the NGO members for their concern for the old people.
(a) What is the cost of one blanket donated?
(b) Name any two items that you can donate to an old age home.
Solution:
(a) Cost of 35 blankets = ₹ 8435
Cost of 1 blanket = ₹ \(\frac{8435}{35}\) = ₹ 241
(b) Medicines, warm clothes etc.
Question 2.
Trees not only make the air pure but also beautify the environment. In a school the members of Eco club were taken for a trip to a nearby nursery. As a part of a project the children planted 95 saplings of different trees in the nursery. The cost of each sapling was ₹ 175. The children were very thrilled and happy with the project.
(a) What is the amount spent on the saplings? (Use distributive property)
(b) Name any two saplings that you will like to plant in your garden or nearby park.
Solution:
(a) Cost of planting 1 sapling = ₹ 175
Cost of planting 95 sapling = ₹ 175 x 95
= ₹ 175 x (100 – 5)
= ₹ (175 x 100 – 175 x 5)
= ₹ (17500 – 875)
= ₹ 16,625
(b) Peepal and Neem.