Question 1

Which of the following is a rational number?

Accepted Answer

A rational number is defined as a number that can be expressed in the form p/q, where p and q are integers and q != 0. Among the given options, 3/4 fits this definition perfectly.

Question 2

What is the standard form of -15/25?

Accepted Answer

To find the standard form, divide both the numerator and the denominator by their HCF, which is 5. -15 / 5 = -3 and 25 / 5 = 5. Thus, the standard form is -3/5.

Question 3

Which rational number is greater: -2/5 or -4/5?

Accepted Answer

When denominators are the same, the rational number with the greater numerator is greater. Between -2 and -4, -2 is greater because it lies to the right of -4 on the number line.

Question 4

What is the sum of 5/8 and (-3)/8?

Accepted Answer

To add rational numbers with the same denominator, add their numerators: 5 + (-3) = 2. Keep the denominator same. So, 2/8 simplifies to 1/4.

Question 5

What is the additive inverse of -7/12?

Accepted Answer

The additive inverse of a rational number a/b is -a/b. The additive inverse of -7/12 is -(-7/12) = 7/12.

Rational Numbers — NCERT Class 7 Mathematics Important Questions & Revision Notes