Вычислите:

1) (5/7)²*7/15;

2) (3/4)²*32/45;

3) (1/2)²*4/5;

4) (2 5/7)²*14/19;

5) (2 1/3)²*27/98;

6) (8/11)²*11/32;

7) (3/10)²*5/6;

8) (2/3)²*15/24;

1) (5/7)²*7/15 = 25/49*7/15 = 50/1332) (3/4)²*32/45 =9/16*32/45 = 18/453) (1/2)²*4/5 = 1/4*4/5 = 1/56) (8/11)²*11/32 = 64/121*11/32 = 2/117) (3/10)²*5/6 = 9/100*5/6 = 3/408) (2/3)²*15/24 = 15/54