(9+13)=22
22÷11=2
2X12=24
综上:(9十13)÷11x12
=22÷11X12
=2X12
=24
12×(9+13)÷11
=12×22÷11
=12×(22÷11)
=12×2
=24
12×【(13+9)÷11】
12÷(11÷(13+9))=24
(12/11)×(13+9) =24
12×((13+9)÷11)=24
(12×(13+9))÷11 =24
12×((9+13)÷11) =24
(12×(9+13))÷11=24
(13+9)÷(11÷12)=24
((13+9)÷11)×12 =24
((13+9)×12)÷11=24
(13+9)×(12÷11)=24
(9+13)÷(11÷12) =24