даю 15 баллов матеша тут легкая я просто туплю

1) 2 1/6 ÷ (8 3/4 - 5 1/2)
2) (4 3/5 - 2 1/5) ÷ 1 1/10
3) 3 1/8 ÷ 15/16 - 1/4
4) (11 5/8 + 7 1/6 ) ÷ 3 5/12

помгите пж писал минут 10 - 20
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