Сократите: 1) 12*21 / 35*15; 3) 25*17*44 / 51*8*75; 5) 17*48 / (17*16 - 9*16); 2) 72*11 / 33*30; 4) (8*3+8*23) / 3*16; 6) (14*5 - 14*3) / (21*9 + 21*3).

1) 12*21 / 35*15 = 4*3 / 5*5 = 12/25; 2) 72*11 / 33*30 = 12*1 / 3*5 = 12/15;

3) 25*17*44 / 51*8*75 = 1*1*11 / 3*2*3 = 11/18;

4) (8*3+8*23) / 3*16 = 8 * (3+23) / 3*16 = 1*26 / 3*2 = 13 / 3*1 = 13/3 = 4 1/3;

5) 17*48 / (17*16 - 9*16) = 17*48 / 16 * (17-9) = 17*3 / 1*8 = 51/8 = 6 3/8;

6) (14*5 - 14*3) / (21*9 + 21*3) = 14 * (5-3) / 21 * (9+3) = 14*2 / 21*12 = 2*1 / 3*6 = 1/9.