# NCERT Class 8 Solutions: Rational Numbers (Chapter 1) Exercise 1.1 – Part 4 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Q-7) Tell what property allows you to compute

Solution:

By the property of associativity

Q-8) Is the multiplicative inverse of ? Why or why not?

Solution:

If it will be the multiplicative inverse then their product will be 1.

inver

Therefore,

Hence, is not the multiplicative inverse.

Q-9 Is the multiplicative inverse of ? Why or why not?

Solution:

If it will be the multiplicative inverse then their product will be 1.

Also

That is

Hence, is the multiplicative inverse.

Q-10 Write

- The rational number that does not have a reciprocal.
- The rational numbers that is equal to their reciprocals.
- The rational number that is equal to its negative.

Solution:

- 0 (Zero) is the rational number which does not have a reciprocal.
- 1 and -1 are the rational numbers which are equal to their reciprocals

- 0 is the rational number that is equal to its negative