Question

Please help me with this

Answer 1

Your answer would be 5

Answer 2

Because "20+30" is inside parentheses, you must combine 20 and 30 FIRST.  Next, divide your result by 10.  That's your answer.
Here we are following "order of operations" rules (sometimes referred to as "PEMDAS."  Know these rules?  if not, please learn them.