Question

Помогите решить: найдите значение выражения номер 634
Даю 25 баллов!

Answer 1

$\displaystyle7\frac{1}{8}\div4\frac{3}{4}\cdot8=57\div\frac{19}{4}=57\cdot\frac{4}{19}=3\cdot4=12\\\\\\11\frac{1}{3}\div\frac{4}{21}\div4\frac{1}{4}=\frac{34}{3}\div\frac{4}{21}\div\frac{17}{4}=\frac{34}{3}\cdot\frac{21}{4}\cdot\frac{4}{17}=2\cdot7=14\\\\\\1\frac{7}{9}\cdot2\frac{2}{5}\div1\frac{3}{5}=\frac{16}{9}\cdot\frac{12}{5}\div\frac{8}{5}=\frac{16}{3}\cdot\frac{4}{5}\cdot\frac{5}{8}=\frac{2}{3}\cdot4=\frac{8}{3}$

$\displaystyle\frac{7}{8}\cdot\frac{8}{9}\div1\frac{1}{9}=7\cdot\frac{1}{9}\div\frac{10}{9}=7\cdot\frac{1}{9}\cdot\frac{9}{10}=7\cdot\frac{1}{10}=\frac{7}{10}$

Answer 2

Ответ:

Пошаговое объяснение:

а)

7. 1/8 : 4. 3/4 * 8 =

57/8 : 19/4 * 8 =

57/8 * 4/19 * 8 =

3/2 * 1/1 * 8 = 3/2 * 8 =

24/2 = 12

б)

11. 1/3 : 4/21 : 4. 1/4 =

34/3 : 4/21 : 17/4 =

34/3 * 21/4 * 4/17 =

17/1 * 7/2 * 4/17 =

17/1 * 4/17 * 7/2 = 4/1 * 7/2 = 28/2 = 14

в)

1. 7/9 * 2. 2/5 : 1. 3/5 =

16/9 * 12/5 : 8/5 =

16/9 * 12/5 * 5/8 =

16/9 * 12/8 = 2/3 * 4/1 = 8/3 = 2. 2/3

г)

7/8 * 8/9 : 1. 1/9 =

7/8 * 8/9 : 10/9 =

7/8 * 8/9 * 9/10 =

7/9 * 9/10 = 7/10