1)1/3*1 1/2 = 1/3 * 3/2 = 1/2;

2)1/5*1 2/3 = 1/5 * 5/3 = 1/3;

3)1/4*1 1/2 = 1/4 * 3/2 = 3/8;

4)1/7*2 4/5 = 1/7 * 14/5 = 2/5;

5)1/8*3 1/5 = 1/8 * 16/5 = 2/5;

6)1/9*3 3/5 = 1/9 * 18/5 = 2/5