Question

Срочно!!!
510 пожалуйста !!!

Answer 1

а) 4/15+13/45 = 12/45+13/45 = 25/45 = 5/9
б) 5/64+7/16 = 5/64+28/64 = 33/64
в) 2/19+13/57 = 6/57+13/57 = 19/57
г) 4/63+8/21 = 4/63+24/63 = 28/63 = 4/9