Question

填运算符号1( )3( )9( )10( )=24

Answer 1

1:(1 + 10) × 3 - 9

2:((1 + 10) × 3) - 9

3:(3 × (1 + 10)) - 9

4:3 × (1 + 10) - 9

5:(3 × (10 + 1)) - 9

6:3 × (10 + 1) - 9

7:(10 + 1) × 3 - 9

8:((10 + 1) × 3) - 9