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

1) 5/4;

3/2 = 3 * 2 / 2 * 2 = 6/4.

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

2/15.

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

5/9 = 5 * 5 / 9 * 5 = 20/45.

4) 1/6 = 1 * 5 / 6 * 5 = 5/30;

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

5) 1/3 = 1 * 6 / 3 * 6 = 6/18;

5/18.

6) 5/8 = 5 * 3 / 8 * 3 = 15/24;

2/3 = 2 * 8 / 3 * 8 = 16/24.

7) 1/2 = 1 * 15 / 2 * 15 = 15/30;

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

8) 5/12 = 5 * 5 / 12 * 5 = 25/60;

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

9) 3/10 = 3 * 10 / 10 * 10 = 30/100;

33/100.