5 целых 17/30 - 2/15-(2-1 целых 5/6+3,4)

Question

5 целых 17/30 - 2/15-(2-1 целых 5/6+3,4)

Answer 1

5 17/30-2/15-(2-1 5/6+3,4)=5 17/30-4/30-(1- 5/6+3 4/10)=5 13/30-(1/6+3 2/5)=
=5 13/30-(5/30+3 12/30)=5 13/30-3 17/30=2 13/30-17/30=2- 4/30=2- 2/15=
=1 13/15