ГДЗ Математика 6 клас Істер — Вправа 440

1) $\frac{6}{35} : \frac{18}{49} = \frac{6}{35} \cdot \frac{49}{18} = \frac{1 \cdot 7}{5 \cdot 3} = \frac{7}{15};$

2) $\frac{14}{39} : \frac{21}{52} = \frac{14}{39} \cdot \frac{52}{21} = \frac{2 \cdot 4}{3 \cdot 3} = \frac{8}{9};$

3) $\frac{27}{28} : \frac{9}{56} = \frac{27}{28} \cdot \frac{56}{9} = 3 \cdot 2 = 6;$

4) $\frac{45}{64} : \frac{35}{76} = \frac{45}{64} \cdot \frac{76}{35} = \frac{9 \cdot 19}{16 \cdot 7} = \frac{171}{112} = 1\frac{59}{112}.$