решить 1 1/5*5/12:(3 11/30+ 7 2/15)

ц - целые)))

1 1/5 * 5/12 : (3 11/30 + 7 2/15) = 1/151) 3 11/30 + 7 2/15 = 10 + (11/30 + 2/15) = 7 + (11+4)/30 = 7 15/30 = 7 1/22) 1 1/5 * 5/12 = 6/5 * 5/12 = 1/23) 1/2 : 7 1/2 = 1/2 : 15/2 = 1/2 * 2/15 = 1/15