2/3 + 10/3 x 7/4 + 1/6
= 2/3 + 5/3 x 7/2 + 1/6
= 2/3 + 35/6 + 1/6
= 2/3 + 36/6
= 2/3 + 6
= 6又3分之2
p/s:2/3= 3分之2