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,

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.