In a certain code language, multiplication represents '+', division represents '×', subtraction represents '÷' and addition represents '-'.
Solve it
30 ÷ 20 - 10 + 10 × 5 = ?
1
20
2
45
3
30
4
55
In a certain code language, multiplication represents '+', division represents '×', subtraction represents '÷' and addition represents '-'.
Solve it
30 ÷ 20 - 10 + 10 × 5 = ?