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Practice Questions: Working with Fractions | Mathematics (Ganita Prakash) Class 7 - New NCERT PDF Download

Q1. Mark has 3/4 kg of flour and uses 1/8 kg for each cookie batch. How many batches can he make?

Sol:
Total flour = 3/4 kg
Flour per batch = 1/8 kg
Number of batches = Total flour ÷ Flour per batch
= (3/4) ÷ (1/8)
= (3/4) × (8/1)
= (3 × 8) / 4 
= 24 / 4 
= 6

Q2. A string of 4/7 meter is cut into 8 equal pieces. What is the length of each piece?

Sol:
Total length = 4/7 meter
Number of pieces = 8
Length per piece = Total length ÷ Number of pieces
= (4/7) ÷ 8
= (4/7) × (1/8)
= 4 / 56 
= 1 / 14 meter

Q3. Simplify: (3/4) × (8/9) ÷ (2/3)

Sol:
Perform multiplication and division from left to right:
(3/4) × (8/9) 
= (3 × 8) / (4 × 9) 
= 24 / 36 
= 2 / 3
(2/3) ÷ (2/3) 
= (2/3) × (3/2) 
= (2 × 3) / (3 × 2) 
= 6 / 6 
= 1

Q4. Each side of a square tile is 3/4 meter. Find its area.

Sol:
Area of a square = side × side
Side = 3/4 meter
Area = (3/4) × (3/4) = 9 / 16 m2​​​​

Q5. A printer can print 2/3 pages in one minute. How many minutes will it take to print 8/5 pages?

Sol:
Pages per minute = 2/3
Total pages to print = 8/5
Time required = Total pages ÷ Pages per minute
= (8/5) ÷ (2/3)
= (8/5) × (3/2)
= (8 × 3) / (5 × 2) = 24 / 10 = 12 / 5 minutes.

Q6. Divide the sum of 5/6 and 2/3 by 3/4.

Sol:
Sum of fractions:
5/6 + 2/3 = 5/6 + 4/6 = 9/6 = 3/2
Divide by 3/4:
(3/2) ÷ (3/4) = (3/2) × (4/3)
= (3 × 4) / (2 × 3) 
= 12 / 6 
= 2

Q7.Arrange in ascending order: Practice Questions: Working with Fractions | Mathematics (Ganita Prakash) Class 7 - New NCERT

Sol:Practice Questions: Working with Fractions | Mathematics (Ganita Prakash) Class 7 - New NCERT

Q8. Simplify and reduce to lowest terms: Practice Questions: Working with Fractions | Mathematics (Ganita Prakash) Class 7 - New NCERT

Sol: LCM of 15 and 9 = 45
Practice Questions: Working with Fractions | Mathematics (Ganita Prakash) Class 7 - New NCERT

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FAQs on Practice Questions: Working with Fractions - Mathematics (Ganita Prakash) Class 7 - New NCERT

1. What are the basic operations that can be performed with fractions?
Ans. The basic operations that can be performed with fractions include addition, subtraction, multiplication, and division. To add or subtract fractions, they must have a common denominator. For multiplication, you multiply the numerators together and the denominators together. For division, you multiply by the reciprocal of the second fraction.
2. How do you simplify a fraction?
Ans. To simplify a fraction, you need to divide both the numerator and the denominator by their greatest common divisor (GCD). For example, to simplify 8/12, the GCD of 8 and 12 is 4. Dividing both by 4 gives you 2/3, which is the simplified form.
3. What is the difference between a proper fraction and an improper fraction?
Ans. A proper fraction is a fraction where the numerator is less than the denominator, such as 3/4. An improper fraction, on the other hand, has a numerator that is greater than or equal to the denominator, such as 5/4 or 6/6. Improper fractions can also be converted into mixed numbers.
4. How can you convert a mixed number into an improper fraction?
Ans. To convert a mixed number into an improper fraction, multiply the whole number by the denominator of the fractional part, then add the numerator of the fractional part. This sum becomes the new numerator while retaining the same denominator. For example, to convert 2 1/3 into an improper fraction: (2 × 3) + 1 = 7, so it becomes 7/3.
5. Why is it important to find a common denominator when adding or subtracting fractions?
Ans. Finding a common denominator is important when adding or subtracting fractions because it allows you to combine the fractions accurately. Without a common denominator, the fractions represent different parts of a whole and cannot be directly added or subtracted. The common denominator ensures that both fractions are expressed in terms of the same size parts.
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