Find 12 rational numbers between −1 and 2.

We may write:

$-1=\frac{-10}{10}$

and

$2=\frac{20}{10}$

Rational numbers between $-1$ and 2 :

$\frac{-9}{10}, \frac{-8}{10}, \frac{-7}{10}, \frac{-6}{10}, \frac{-5}{10}, \frac{-4}{10}, \ldots, \frac{14}{10}, \frac{15}{10}, \frac{16}{10}, \frac{17}{10}, \frac{18}{10}$ and $\frac{19}{10}$

We can take any 12 numbers out of these.