Question

Помогите решить эти два примера

Answer 1

$1) \ ( frac{4}{5} - frac{3}{4} ) times ( frac{3}{4} - frac{4}{5} ) = \ ( frac{4 times 4 - 3 times 5}{20} ) times ( frac{3 times 5 - 4 times 4}{20} ) = \ ( frac{16 - 15}{20} ) times ( frac{15 - 16}{20} ) = \ frac{1}{20} times ( - frac{1}{20} ) = - frac{1}{400}$

2) 8 13/20 - 18 103/120+ 10 5/24= 173/120 - 2263/120 + 10 5/24= -1225/120 + 10 5/24= -10 5/24 + 10 5/24=0