2. 4/7=16/28. 3/18=? тут ошибка, как 18 привести к 24??
3. 3/5 и 4/7= 21/35 и 20/35
б) 2/5 и 7/15= 6/15 и 7/15
в) 5/14 и 8/35= 25/70 и 16/35
4. 3/2= 1,15
б) 19/50= 0,38
в) 106/125= 0,848
5. 15/27= 5/9
24/42=12/21=4/7
5/9 и 4/7= 35/63 и 36/63
б) 15/54= 5/18
28/48= 14/24=7/12
5/18 и 7/12= 10/36 и 21/36