(1/3+1/4÷1/6)÷1/12=(1/3+1/4×6)×12=(1/3+3/2)×12=1/3×12+3/2×12=4+18=22
(1/3+1/4÷1/6)÷1/12=(1/3+1/4÷1/6)×12=1/3×12+1/4×6×12=4+18=22
(1/3+1/4÷1/6)÷1/12=(1/3+3/2)÷1/12=5/3×12=20