Thực hiện phép tính. a) 112 – 48 : (12,56 + 35,44)

a) 112 – 48 : (12,56 + 35,44) = 112 – 48 : 48

= 112 – 1

= 111

b) \(\left( {2\frac{5}{6} - \frac{7}{8}} \right) \times \left( {50\% + 0,75 - \frac{1}{4}} \right)\)

\( = \left( {\frac{{17}}{6} - \frac{7}{8}} \right) \times \left( {\frac{1}{2} + \frac{3}{4} - \frac{1}{4}} \right)\)

\( = \left( {\frac{{68}}{{24}} - \frac{{21}}{{24}}} \right) \times \left( {\frac{1}{2} + \frac{1}{2}} \right)\)

\( = \frac{{47}}{{24}} \times 1\)

\( = \frac{{47}}{{24}}\)