Question

120:{54-[50:2(9-2.40}]

Answer 1

=120:{54-25(9-80)}

=120:{54-25*(-71)}

=120/1829

Answer 2

\(120:\left\{54-\left[50:2\left(9-2.40\right)\right]\right\}\)

\(=120:\left\{54-\left[50:2\times-71\right]\right\}\)

\(=120:\left\{54--1775\right\}\)

\(=120:1829\)

\(=\dfrac{120}{1829}\)