Question

(4/5-3/4)•(3/4-4/5)= (3,42-3/4): (4/5+4,3)=

Answer 1

А) ($\frac{4}{5} - \frac{3}{4}$) × ($\frac{3}{4} - \frac{4}{5}$) = ($\frac{16-15}{20}$) ×($\frac{15-16}{20}$) = $\frac{1}{20}$ × (-$\frac{1}{20}$) = -$\frac{1}{400}$
б) (3,42-3/4):(4/5+4,3)= (3$\frac{42}{100}$ - $\frac{3}{4}$) : ($\frac{4}{5}$ + 4 $\frac{3}{10}$) = ($\frac{342}{100}$ - $\frac{3}{4}$) : ($\frac{4}{5} + \frac{43}{10}$) = ($\frac{342-75}{100}$) : ($\frac{8+43}{10}$) = $\frac{267}{100} : \frac{51}{10}$ = $\frac{267}{100} * \frac{10}{51}$ = $\frac{89}{170}$ ≈ 0,5