(13÷6)×8+6
first you need to divide the one in the parenthesis, so the answer will be
(13÷6)=2.16 then,
2.17×8+6
at that point you need to do the multiplacation first, 2.17×8.
2.17×8 = 17.36 then,
17.36 + 6 now you gonna add this numbers
so the answer is 23.36.
for the other question, the same thing do the one in the parenthesis first then the multiplication then the addition.
PEMDAS - Parenthesis, Exponent, Multiplication, Division, Addition, Subtraction
just follow this then you will got your answer.