NCERT Class 8 Solutions: Rational Numbers (Chapter 1) Exercise 1.1 – Part 4
Q7) Tell what property allows you to compute
Solution:
By the property of associativity
Q8) 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.
Q9 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.
Q10 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