79. Найдите частное: 1) 10 : $$\frac{5}{9}$$; 3) $$\frac{9}{16}$$ : 36; 2) 1 : $$\frac{8}{13}$$; 4) 2$$\frac{13}{16}$$ : 4$$\frac{3}{8}$$ ,

79.1

10 : $$\frac{5}{9}$$ = 10 * $$\frac{9}{5}$$ = $$\frac{10 * 9}{5}$$ = $$\frac{90}{5}$$ = 18

Ответ: 18

79.2

1 : $$\frac{8}{13}$$ = 1 * $$\frac{13}{8}$$ = $$\frac{13}{8}$$ = 1$$\frac{5}{8}$$

Ответ: 1$$\frac{5}{8}$$

79.3

$$\frac{9}{16}$$ : 36 = $$\frac{9}{16}$$ * $$\frac{1}{36}$$ = $$\frac{9 * 1}{16 * 36}$$ = $$\frac{9}{576}$$ = $$\frac{1}{64}$$

Ответ: $$\frac{1}{64}$$

79.4

2$$\frac{13}{16}$$ : 4$$\frac{3}{8}$$ = $$\frac{2 * 16 + 13}{16}$$ : $$\frac{4 * 8 + 3}{8}$$ = $$\frac{45}{16}$$ : $$\frac{35}{8}$$ = $$\frac{45}{16}$$ * $$\frac{8}{35}$$ = $$\frac{45 * 8}{16 * 35}$$ = $$\frac{360}{560}$$ = $$\frac{9}{14}$$

Ответ: $$\frac{9}{14}$$