(2-1 7/12):(3/8 - 1/6)×3 1/4=?? (7/10-2/5)×(1/4+5/6):6 1/2=??
(2-1 7/12):(3/8 - 1/6)×3 1/4=(5/9:(9-4)/24)*13/4=(5/9:5/24)*13/4=24/9*13/4=6*13/9=26/3=8 2/3
7/12 : 5/24 * 13/4 = 7/12*24/5 * 13/4= 14/5*134= 9,1 3/10 * 13/12 : 13/2 = 1/20