Приведите дроби 1/4, 7/6, 3/8, 17/12 к знаминателю 24; 2/3, 7/5, 4/9, 16/15 к знаминателю 90; 5/12, 7/9, 5/6, 4/4 к знаминателю 36; 3/5, 3/4, 8/25, 7/50 к знаминателю 100.

Приведем дроби к знаменателю 24:

1) 1/4 = 6/24;

24 : 4 = 6.

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

24 : 6 = 4.

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

24 : 8 = 3.

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

24 : 12 = 2.

Приведем дроби к знаменателю 90:

1) 2/3 = (2 * 30) / 90 = 60/90;

2) 7/5 = (7 * 18) / 90 = 126/90;

3) 4/9 = (4 * 10) / 90 = 40/90;

4) 16/15 = (16 * 6) / 90 = 96/90.

Приведем дроби к знаменателю 36:

1) 5/12 = (5 * 3) / 36 = 15/36;

2) 7/9 = (7 * 4) / 36 = 28/36;

3) 5/6 = (5 * 6) / 36 = 30/36;

4) 4/4 = 36/36;

Приведем дроби к знаменателю 100:

1) 3/5 = (3 * 20) / 100 = 60/100;

2) 3/4 = (3 * 25) / 100 = 75/100;

3) 8/25 = (8 * 4) / 100 = 32/100;

4) 7/50 = (7 * 2) / 100 = 14/100.