21,4 - 5 1/2 - (16 2/3 - 6,6)

Question

21,4 - 5 1/2 - (16 2/3 - 6,6)

Answer 1

1)16 2/3 - 6,6=10 1/15
2)21,4-5 1/2 =15,9
3)15,9-10 1/15=5 5/6

Answer 2

21,4-5 1/2-(16 2/3-6,6)=21,4-5,5-16 2/3+6,6=15,9+6,6-16 2/3=
=22,5-16 2/3=22 5/10-16 2/3=22 15/30-16 20/30=21 45/30-16 20/30=
=5 25/30=5 5/6