The multiplicative inverse of $\dfrac{-5}{12}$ is

1. $\dfrac{5}{12}$

2. $\dfrac{12}{5}$

3. $\dfrac{-12}{5}$

4. $\dfrac{2}{15}$

The product of additive inverse and multiplicative inverse of $\dfrac{-1}{4}$ is

1. 1

2. -1

3. 0

4. $\dfrac{-1}{16}$

Which rational numbers are equal to their reciprocals?

1. 0, 1

2. -1, 0

3. -1, 1

4. -1, 0

Which of the following expressions shows that rational numbers are associative under multiplication?

1. $\dfrac{4}{5} \times \left(\dfrac{-6}{7} \times \dfrac{8}{9}\right) = \left(\dfrac{4}{5} \times \dfrac{-6}{7}\right) \times \dfrac{8}{9}$

2. $\dfrac{4}{5} \times \left(\dfrac{-6}{7} \times \dfrac{8}{9}\right) = \dfrac{4}{5} \times \left(\dfrac{8}{9} \times \dfrac{-6}{7}\right)$

3. $\dfrac{4}{5} \times \left(\dfrac{6}{7} \times \dfrac{8}{9}\right) = \left(\dfrac{8}{9} \times \dfrac{4}{5}\right) \times \dfrac{-6}{7}$

4. $\left(\dfrac{4}{5} \times \dfrac{-6}{7}\right) \times \dfrac{8}{9} = \left(\dfrac{-6}{7} \times \dfrac{4}{5}\right) \times \dfrac{8}{9}$