Fractions and Decimals Class 7 Extra Questions Very Short Answer Type

Question 1.
If 23 of a number is 6, find the number.
Solution:
Let x be the required number.
Hence, the required number is 9.

Question 2.
Find the product of 67 and 223.
Solution:

Question 3.
Solve the following:
Solution:

Question 4.
Multiply 2.05 and 1.3.
Solution:

Fractions and Decimals Class 7 Extra Questions Short Answer Type

Question 5.
Solve the following:
(a) 3 – 23
(b) 4 + 25
Solution:

Question 6.
Arrange the following in ascending order:
Solution:

Question 7.
Find the products:
(i) 2.4 × 100
(ii) 0.24 × 1000
(iii) 0.024 × 10000
Solution:

Question 8.
Arnav spends 134 hours in studies, 212 hours in playing cricket. How much time did he spend in all?
Solution:
Time spent by Arnav in studies = 134 hours
Time spent by Arnav in playing cricket = 212 hours
Total time spent by Arnav = 134 hours + 212 hours

Question 9.
A square paper sheet has 1025 cm long side. Find its perimeter and area.
Solution:

Question 10.
Solution:

Question 11.
The product of two numbers is 2.0016. If one of them is 0.72, find the other number.
Solution:
Product of two numbers = 2.0016
One number = 0.72
Other number = 2.0016 ÷ 0.72
Hence, the required number = 2.78.

Question 12.
Reemu reads 15th pages of a book. If she reads further 40 pages, she would have read 710th
page of the book. How many pages are left to be read? [NCERT Exemplar]
Solution:
Let the total number of pages be x.
Number of pages read by Reemu = 15x
If she reads 40 more pages,
Total number of pages read by her = 15x + 40

Question 13.
18 of a number equals 25 ÷ 120. What is the number? (NCERT Exemplar)
Solution:
Let the number be x.
Hence, the required number = 64.

Question 14.
Simplify the following:
Solution:

Question 15.
The weight of an object on the Moon is 16 its weight on the Earth. If an object weight 5frac { 3 }{ 5 }

35 kg on the Earth. How much would it weight on the Moon? [NCERT Exemplar]
Solution:

Question 16.
A picture hall has seats for 820 persons. At a recent film show, one usher guessed it was 34 full, another that it was 23 full. The ticket office reported 648 sales. Which usher (first or second) made the better guess? [NCERT Exemplar]
Solution:
Total number of seats = 820
Number of ticket sold = 648
For first usher = 34 × 648 = 3 × 162 = 486
For second usher = 23 × 648 = 2 × 216 = 432
Since 432 < 486 Hence, the first usher guessed better.