Найдите значение выражения: 1) 3 3/4 : 3/8 : 1 3/7; 7) (5/12 + 1/8) : 3/8; 2) 3 3/4 : (3/8 : 1 3/7); 8) 5/12 + 1/8 : 3/8; 3) 1 7/9 * 15/32 : 1 19/36; 9) 2 6/7 : (5/6 - 9/14); 4) 1 7/9 * (15/32 : 1 19/36); 10) 2 6/7 : 5/6 - 9/14; 5) 3 4/7 : 1 1/7 * 2/3; 11) 2 1/4 : 1 4/11 - 3/8 : 7/8; 6) 3 4/7 : (1 1/7 * 2/3); 12) (3 1/6 - 5 1/6 : 4 2/15) * 3/92

1) 3 3/4 : 3/8 : 1 3/7=15/4 * 8/3 * 7/10=5/1 * 2/1 * 7/10=10/1 * 7/10=7;

2) 3 3/4 : (3/8 : 1 3/7) = 15/4 : (3/8 * 7/10) = 15/4 : 21/80=15/4 * 80/21=5/1 * 20/7=100/7;

3) 1 7/9 * 15/32 : 1 19/36=16/9 * 15/32 * 36/55=1/1 * 3/1 * 2/11=6/11;

4) 1 7/9 * (15/32 : 1 19/36) = 16/9 * (15/32 * 36/55) = 16/9 * (3/8 * 9/11) = 16/9 * 27/88=

2/1 * 3/11=6/11;

5) 3 4/7 : 1 1/7 * 2/3=25/7 * 7/8 * 2/3=25/1 * 1/4 * 1/3=25/12;

6) 3 4/7 : (1 1/7 * 2/3) = 25/7 : (8/7 * 2/3) = 25/7 * 21/16=25/1 * 3/16=75/16=4 11/16;

7) (5/12 + 1/8) : 3/8 = (10+3) / 24 * 8/3=13/24 * 8/3=13/3 * 1/3=13/9=1 4/9;

8) 5/12 + 1/8 : 3/8=5/12 + 1/8 * 8/3=5/12 + 1/3 = (5+4) / 12=9/12=3/4;

9) 2 6/7 : (5/6 - 9/14) = 2 6/7 : (5/6 - 9/14) = 20/7 : (35-27) / 42=20/7 * 8/42=20/7 * 21/4=

5/1 * 3/1=15/1=15;

10) 2 6/7 : 5/6 - 9/14=20/7 * 6/5 - 9/14=4/7 * 6/1 - 9/14=24/7 - 9/14 = (24*2-9) / 14=

(48-9) / 14=39/14=2 11/14;

11) 2 1/4 : 1 4/11 - 3/8 : 7/8=9/4 * 11/15 - 3/8 * 8/7=3/4 * 11/5 - 3/1 * 1/7=33/20-3/7=

(33*7-3*20) / 140 = (231-60) / 140=171/140=1 31/140;

12) (3 1/6 - 5 1/6 : 4 2/15) * 3/92 = (19/6 - 31/6 * 15/62) * 3/92 = (19/6 - 1/2 * 5/2) * 3/92=

(19/6 - 5/4) * 3/92 = ((19*2-5*3) / 12) * 3/92 = ((38-15) / 12) * 3/92=23/12 * 3/92=

1/4 * 1/4=1/16