Question

сократи дроби с натуральными числителями и знаменателями   15*3\\7*10,   9*5\\5*21,  21*4*3\\9*105,   19*8*11\\12*57*7

Answer 1

(15•3)/(7•10)=9/14
(9•5)/(5•21)=3/7
(21•4•3)/(9•105)=4/15
(19•8•11)/(12•57•7)=22/63

Answer 2

1. 15*3/7*10 = 45/70 = 9/14
2. 9*5/5*21 = 45/105 = 3/7
3. 21*4*3/9*105 = 252/945 = 4/15
4. 19*8*11/12*57*7 = 1484/4788 = 19/61