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NCERT Exemplar · Class 7 · Maths

Chapter 8: Rational Numbers

Practice each question, then open the answer or worked solution.

Questions

55 questions
Q51Written answer

If p/q is a rational number and m is a non-zero integer, then

(p/q) = (p × m)/(q × m)

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Worked solution

Solution:-

True.

A fraction is not changed whether the both numerator and denominator are multiplied by the same number or divided by the same number.

Q52Written answer

If p/q is a rational number and m is a non-zero common divisor of p and q, then

p/q = (p ÷ m)/(q ÷ m)

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Worked solution

Solution:-

True.

A fraction is not changed whether the both numerator and denominator are multiplied by the same number or divided by the same number.

Q53Written answer

In a rational number, denominator always has to be a non-zero integer.

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Worked solution

Solution:-

True.

A number that can be expressed in the form p/q , where p and q are integers and q ≠ 0, is called a rational number.

Q54Written answer

If p/q is a rational number and m is a non-zero integer, then (p/q) = (p × m)/(q × m) is a rational number not equivalent to p/q.

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Worked solution

Solution:-

False.

We know that, a fraction is not changed whether the both numerator and denominator are multiplied by the same number or divided by the same number.

Q55Written answer

Sum of two rational numbers is always a rational number.

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Worked solution

Solution:-

True.

Let us consider the two rational numbers (1/2) and (3/4)

Then, sum of two rational numbers = (1/2) + (3/4)

LCM of 2 and 4 is 4

= (2/4) + (3/4)

= (2 + 3)/4

= 5/4 is a rational number.