Question

4*(2 1\2+1 3\4)-(6 2\3+4 4\5)

Answer 1

$4 \times (2 \frac{1}{2} + 1 \frac{3}{4} ) - (6 \frac{2}{3} + 4 \frac{4}{5} ) = 4 \times\frac{17}{4} - \frac{172}{15} = 17 - 11 \frac{7}{15} = 5 \frac{8}{15}$