Выполните действия 1) 5/24+7/60 2) 11/21-3/35 3) 5/42+10/63 4) 19/60-8/45 5) 5/18+9/24-7/12 6) 3/20-2/25+1/30 ! нужно решение и

1) 5/24+7/60 = 25/120 + 14/120 = 39/120 = 13/40
2) 11/21-3/35 = 55/105 - 9/105 = 46/105
3) 5/42+10/63 = 15/126 + 20/126 = 35/126 = 5/18
4) 19/60-8/45 = 57/180 - 32/180 = 25/180 = 5/36
5) 5/18+9/24-7/12 = 20/72 + 27/72 - 42/72 = 5/72
6) 3/20-2/25+1/30 = 45/300 - 24/300 + 10/300 = 31/300