Сократите дроби: 42/720 , 75/300 , 40/64 , 3/243 , 18/300 ,45/900 , 120/180 , 2x3/4x5 ,...

Question

Сократите дроби: 42/720 , 75/300 , 40/64 , 3/243 , 18/300 ,45/900 , 120/180 , 2x3/4x5 , 2x3/7x2 , 5x4/4x9 , 7x5/2x7

Answer 1

42/720-21/360-7/120
75/300-5/20-1/4
40/64-10/16-5/8
3/243-1/81
18/300-9/150-3/50-
45/900-1/20
120/180-2/3
2•3/4•5-3/10
2•3/7•2-3/7
5•4/4•9-5/9
7•5/2•7-5/2-2.1/2 (вот так)(устал)