Răspuns:
•(2/3+1/6):7/3×0,4=(4/6+1/6):7/3×0,4=5/6:7/3×0,4=5/6×3/7×0,4=15/42×0,4=15/42×4/10=60/420(care se poate simplifica cu 60 si va da 1/7)
(12/18+3/18):7/3•0,4 105/126•54/126•0,4
15/18:7/3•0,4 13130/126•0,4
15/18•3/7•0,4 13130/126•4/10
131300/1260•504/1260
R:6617520/126
