calcule as frações e,se possível ,simplifique o resultado
a)1/10+7/10
b)5/6-1/6
C)1/10+7/10-3/10
d)7/15-3/15-1/15
e)7/20+1/20+7/20
f)5/18+11/18-13/18
g)7/6+4/6-5/6+3/6-9/6
h)1/20+3/20+11/20-7/20 ​