Question 34: Do the calculation \(\left| {0.5 – \frac{3}{4}} \right| \cdot \left| {\frac{1}{5} – 0.4} \right | \) we get:

We have

\(\left| {0.5 – \frac{3}{4}} \right| \cdot \left| {\frac{1}{5} – 0.4} \right| = \left| {\ frac{1}{2} – \frac{3}{4}} \right| \cdot \left| {\frac{1}{5} – \frac{2}{5}} \right| = \left | {\frac{{4 – 6}}{8}} \right|.\left| {\frac{{5 – 10}}{{25}}} \right| = \left| { – \frac{ 1}{4}} \right|.\left| { – \frac{1}{5}} \right| = \frac{1}{4}.\frac{1}{5} = \frac{1 }{{20}}\)