Question

9 3/14-7 9/14+4 13/14=

Answer 1

$displaystyle 9frac{3}{14}-7frac{9}{14}+4frac{13}{14} =9+frac{3}{14}-bigg(7+frac{9}{14} bigg)+4+frac{13}{14} = \\\=9+frac{3}{14}-7-frac{9}{14} +4+frac{13}{14} =(9-7+4)+ bigg(frac{3}{14}- frac{9}{14}+ frac{13}{14} bigg)= \\\ =6+frac{7}{14} =6+frac{1}{2}=6frac{1}{2}$