Пожалуйста помогите. 1/2-1/3+1/7-2⅓ б) 7/9-2/3-3¹/6-1

Question

Пожалуйста помогите. 1/2-1/3+1/7-2⅓ б) 7/9-2/3-3¹/6-1

Answer 1

1/2 - 1/3 + 1/7 - 2 1/3 = 1/2  - 1/3 + 1/7 - 7/3 = (21-14+6-98)/42 = -85/42 = -2 1/42
7/9 - 2/3 - 3 1/6 - 1 = 7/9 - 2/3 - 19/6 - 1 = (14-12-57-18)/18 = -73/18 = -4 1/18