Question

4*(2 1/2 + 1 3/4) - (6 2/3 + 4 4/5) : 2

Answer 1

$4 \times (2 \frac{1}{2} + 1 \frac{3}{4}) - (6 \frac{2}{3} + 4 \frac{4}{5} ) \div 2 = 4 \times ( \frac{5}{2} + \frac{7}{4} ) - ( \frac{20}{3} + \frac{24}{5} ) \div 2 = 4 \times \frac{17}{4} - \frac{172}{15} \times \frac{1}{2} = 17 - \frac{86}{15} = \frac{169}{15} = 11 \frac{2}{15}$