Ответ:

1) 3/10; 5/12; 11/15

НОК(10;12;15) = 5*2*2*3 = 60

2*5 = 10

2*2*3 = 12

3*5 =15

3/10 = 18/60

5/12 = 25/60

11/15 = 44/60

2) 1/18; 5/12; 3/16

НОК(18;12;16) = 3*3*2*2*2*2 = 144

2*3*3 = 18

2*2*3 = 12

2*2*2*2 = 16

1/18 = 8/144

5/12 = 60/144

3/16 = 27/144

3) 11/16; 17/24; 19/30

НОК(16;24;30) = 2*2*2*2*3*5 = 240

2*2*2*2 = 16

2*2*2*3 = 24

2*3*5 = 30

11/16 = 165/240

17/24 = 170/240

19/30 = 152/240

4) 13/15; 9/20; 24/25

НОК(15;20;25) = 3*2*2*5*5 = 300

3*5 = 15

2*2*5 = 20

5*5 =25

13/15 = 260/300

9/20 = 135/300

24/25 = 288/300

Пошаговое объяснение: