Question

решить 1 1/5*5/12:(3 11/30+ 7 2/15)

Answer 1

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