Сократите дроби при уножении
1) 9*16 / 8*27

2) 8*28 / 35*12

3) 2*3*5 / 4*9*25

4) 7*13-7*2 / 35*9+35*2

1) 9*16 / 8*27 = /сокр.9 и 27, 16 и 8/ = 2/3,2) 8*28 / 35*12 = /8 и 12, 28 и 35/ = 2*4 / 5*3 = 8/15,3) 2*3*5 / 4*9*25 = /2 и 4, 3 и 9, 5 и 25/ = 1 / 2*3*5 = 1/30,4) (7*13-7*2) / (35*9+35*2) = = 7*(13-2) / (9+2)*35 = = 7*11 / 11*35 = /сокр. на 11/ = 7/35 = 1/5