Приведите дроби к наименьшему общему знаменателю: 5/4 и 2/15 2/3 и 2/15 7/15 и 5/9 1/6 и 3/10 1/3 и 5/18 5/8 и 3/2 1/2

1) 5/4 и 2/15;

5/4 = 5 * 15 / 4 * 15 = 75/60;

2/15 = 2 *4 / 15 * 4 = 8/60.

2) 2/3 и 2/15;

2/3 = 2 * 5 / 3 * 5 = 10/15;

2/15.

3) 7/15 и 5/9;

7/15 = 7 * 3 / 15 * 3 = 21/45;

5/9 = 5 * 5 / 9 * 5 = 25/45.

4) 1/6 и 3/10;

1/6 = 1 * 5 / 6 * 5 = 5/30;

3/10 = 3 * 3/ 10 * 3 = 9/30.

5) 1/3 и 5/18;

1/3 = 1 * 6 / 3 * 6 = 6/18;

5/15.

6) 5/8 и 3/2;

3/2 = 3 * 4 / 2 * 4 = 12/8;

5/8.

7) 1/2 и 2/15;

1/2 = 1 * 15 / 2 * 15 = 15/30;

2/15 = 2 * 2 / 15 * 2 = 4/30.

8) 5/12 и 7/15;

5/12 = 5 * 5 / 12 * 5 = 25/60;

7/15 = 7 * 4 / 15 * 4 = 28/60.