If '×' represents '+', '÷' represents '×', '-' represents '÷' and '+' represents '-', then find the value of the following expression.
9 - 1 + 10 × 5 ÷ 2 = ?
1
10
2
-1
3
9
4
-5
If '×' represents '+', '÷' represents '×', '-' represents '÷' and '+' represents '-', then find the value of the following expression.
9 - 1 + 10 × 5 ÷ 2 = ?