2/3-1/2+1/6=4/6-3/6+1/6=(4-3+1)/6=2/6=1/3
(1-2/3)/(2-3/4)=1/3÷5/4=1/3*5/4=4/15
(1-1/2+1/4)*12=(1-2/4+1/4)*12=3/4*12=9
1/3+3/4+6*2/3=1/3+3/4+4=4/12+9/12+48/12=(4+9+48)/12=61/12
2/3-1/2+1/6=4/6-3/6+1/6=(4-3+1)/6=2/6=1/3
(1-2/3)/(2-3/4)=1/3÷5/4=1/3*5/4=4/15
(1-1/2+1/4)*12=(1-2/4+1/4)*12=3/4*12=9
1/3+3/4+6*2/3=1/3+3/4+4=4/12+9/12+48/12=(4+9+48)/12=61/12