Question

\(-\dfrac{3}{4}.31\dfrac{11}{23}-0,75.8\dfrac{12}{23}\)

Answer 1

\(-\dfrac{3}{4}.31\dfrac{11}{23}-0,75.8\dfrac{12}{23}\)

\(=-\dfrac{3}{4}.31\dfrac{11}{23}-\dfrac{3}{4}.8\dfrac{12}{23}\)

\(=-\dfrac{3}{4}.\left(31+\dfrac{11}{23}+8+\dfrac{12}{12}\right)\)

\(=-\dfrac{3}{4}.\left(31+8+1\right)\)

\(=-\dfrac{3}{4}.40\)

\(=-3.10\)

\(=-30\)

Answer 2

- \(\dfrac{3}{4}\).31\(\dfrac{11}{23}\) - 0,75.8\(\dfrac{12}{23}\)

= - \(\dfrac{3}{4}\).\(\dfrac{724}{23}\) - \(\dfrac{3}{4}\)\(\dfrac{196}{23}\)

=   - \(\dfrac{3}{4.23}.\left(724+196\right)\)

= - \(\dfrac{3}{92}\) . 920

= - 30