20целых3/8-(6целых-2целых1/6)
20⅜-(6-2¹/6) 5*⅔-(6-⅓) 15/2-17/3 11/6
20 3/8-(6-2 1/6)=20 3/8-(5 6/6-2 1/6)=20 3/8-3 5/6=19 11/8-3 5/6= 33-20/24=13/24