Приведи дроби с натуральными числителями и знаменателями к наименьшему общему знаменателю: 1) 14/75 и 8/15; 2) 9/16 и 4/9; 3) 5/12 и 3/8; 4) 7/32 и 13/24; 5) 8/105 и 7/135; 6) 13/25, 11/15 и 3/20; 7) 5/2a и 8/3a; 8) b/8cd и n/10d;

1) 75:    14/75 = 14/75    8/15 = 8*5/15*5 = 40/75 2) 144:     9/16 = 9*9/16*9 = 81/144     4/9 = 4*16/9*16 = 64/144 3) 48:     5/12 = 5*4/12*4 = 20/48     3/8 = 3*6/8*6 = 18/48 4) 96:    7/32 = 7*3/32*3 = 21/96    13/24 = 13*4/24*4 = 52/96 5) 14.175:     8/105 = 8*135/105*135 = 1.080/14.175     7/135 = 7*105/135*105 = 735/14.175 6) 300:    13/25 = 13*12/25*12 = 156/300    11/15 = 11*20/15*20 = 220/300    3/20 = 3*15/20*15 = 45/300 7) 6:     5/2а = 5*3/2*3а = 15/6а     8/3а = 8*2/3*2а = 16/6а 8) 8*10*c*d = 80cd:     b/8cd = b*10/8cd*10 = 10b/80cd     n/10d = n*8c/10d*8c = 8cn/80cd