Question

пожалуйста решите!!!

Answer 1

1)
(3/4 + 1/5) * 5/19 = 1/4,

1) 3/4 + 1/5 = 15/20 + 4/20 = 19/20,
2) 19/20 * 5/19 = 5/20 = 1/4,

2)
(12 1/3 - 7 3/4) * 6/11 = 2 1/2,

1) 12 1/3 - 7 3/4 = 12 4/12 - 7 9/12 = 11 16/12 - 7 9/12 = 4 7/12,
2) 4 7/12 * 6/11 = 55/12 * 6/11 = 5/2 = 2 1/2,

3)
(2 3/5 - 5/8) : 19 3/4 = 1/10,

1) 2 3/5 - 5/8 = 2 24/40 - 25/40 = 1 64/40 - 25/40 = 1 39/40,
2) 1 39/40 : 19 3/4 = 79/40 : 79/4 = 79/40 * 4/79 = 4/40 = 1/10

Answer 2

спасибо большое

Answer 3

пожалуйста :))

Answer 4

$1) ( frac{3}{4} + frac{1}{5} ) * frac{5}{19} =\ =( frac{15}{20} + frac{4}{20} ) * frac{5}{19} =\ =frac{19}{20} * frac{5}{19} =\ =frac{5}{20} = frac{1}{4}$

Ответ: $frac{1}{4}$

$2) (12 frac{1}{3} -7 frac{3}{4} )* frac{6}{11} =\ =(12 frac{4}{12} -7 frac{9}{12} )* frac{6}{11} =\ =(11 frac{16}{12} -7 frac{9}{12} )* frac{6}{11} =\ =4 frac{7}{12} * frac{6}{11} =\ =frac{55}{12} * frac{6}{11} =\ =frac{5}{2} =2 frac{1}{2}$

Ответ: $2 frac{1}{2}$

$3) (2 frac{3}{5} - frac{5}{8} ):19 frac{3}{4} =\ (2 frac{24}{40} - frac{25}{40} ): frac{79}{4} =\ =(1 frac{64}{40} - frac{25}{40} )* frac{4}{79} =\ = 1frac{39}{40} * frac{4}{79} =\ = frac{79}{40} * frac{4}{79} =\ = frac{1}{10}$

Ответ: $frac{1}{10}$