Question

Which of the following is an example of multiplicative identity?
[1 mark]

A. $\frac{2}{3}\times \frac{3}{2}=1$

B. $\frac{2}{3}+0=\frac{2}{3}$

C. $\frac{2}{3}\times 1=\frac{2}{3}$

D. $\frac{2}{3}\times 0=0$

Answer 1

Multiplicative identity of a rational number is that number, which when multiplied with the rational number, gives the same number as the product. The rational number 1 is the multiplicative identity for rational numbers.
[0.5 mark]

So, among given options, $\frac{2}{3}\times 1=\frac{2}{3}$ is an example of multiplicative identity.
[0.5 mark]

Therefore, option (C) is the correct answer.