Rational Number...

Fill the blank spaces: $$....... + \dfrac {3}{7} = ...... + \dfrac {3}{8}$$

The missing value in $$........ + \dfrac {2}{7} = \dfrac {2}{7} + \dfrac {-11}{13}$$ is

Fill in the blank: $$\left (-\dfrac {1}{3}\right ) + \left [\left (\dfrac {-4}{3}\right ) + \dfrac {3}{7}\right ] = \left [\left (\dfrac {-1}{3}\right ) + ..... \right ] + \dfrac {3}{7}$$

......... are associative for rational numbers.

Which property is depicted by $$\dfrac {1}{2} \times \left (6\times \dfrac {4}{3}\right ) = \left (\dfrac {1}{2} \times 6 \right )\times \dfrac {4}{3}$$?

Find the missing value: $$-61 + ....... = \dfrac {2}{3} + (-61)$$

................. are not associative for rational numbers.

................. is the additive inverse of $$\dfrac {-p}{q}$$, where $$\dfrac {-p}{q}$$ is a rational number.

For any integer $$a$$, its additive inverse is ..........