Приведите дроби: а) 3/2, 5/4, 6/5, 31/25 к знаменателю 100. б) 2/5, 5/12, 7/15, 13/30 к знаменателю 60 в) 1/4, 7/6, 3/8, 17/12 к знаменателю 24 г) 2/3, 7/5, 4/9, 16/15 к знаменателю 45

Приведем дроби к знаменателю 100:

1) 3/2 = (3 * 50) / 100 = 150/100;

2) 5/4 = (5 * 25) / 100 = 125/100;

3) 6/5 = (6 * 20) / 100 = 120/100;

4) 31/25 = (31 * 4) / 100 = 124/100.

Приведем дроби к знаменателю 60:

1) 2/5 = (2 * 12) / 60 = 24/60;

2) 5/12 = (5 * 5) / 60 = 25/60;

3) 7/15 = (7 * 4) / 60 = 28/60;

4) 13/30 = (13 * 2) / 60 = 26/60.

Приведем дроби к знаменателю 24:

1) 1/4 = (1 * 6) / 24 = 6/24;

2) 7/6 = (7 * 4) / 24 = 28/24;

3) 3/8 = (3 * 3) / 24 = 9/24;

4) 17/12 = (17 * 2) / 24 = 34/24.

Приведем дроби к знаменателю 45:

1) 2/3 = (2 * 15) / 45 = 30/45;

2) 7/5 = (7 * 9) / 45 = 63/45;

3) 4/9 = (4 * 5) / 45 = 20/45;

4) 16/15 = (16 * 3) / 45 = 48/45.