21. Exemplar exercise problems IX

1. For rational numbers \(\frac{a}{b}\), \(\frac{c}{d}\) and \(\frac{e}{f}\) we have \(\frac{a}{b} \times \left(\frac{c}{d} + \frac{e}{f}\right)\) \(=\) $\left(\frac{i}{i}\times \frac{i}{i}\right)+\left(\frac{i}{b}\times \frac{i}{i}\right)$

 

2. \(\frac{-5}{7}\) is lessergreater than \(-3\).

 

3. There aretwoonefiniteinfinite rational numbers between any two rational numbers.