calcule as frações abaixo:

a)1/2+2/3
b)5/6+2/3
c)4/5+2/3
d) 9/2+7/4+2/3
e)1/2-1/3
f)5/6-1/3
g)4/5-2/7
h)7/8-1/6
i)5/4-1/2
j)8/10-1/5
k)5/6-1/4+2/3
L)8+1/3-3/4

pfv respondam rápido, obg pela ajuda​