Resolva as operações
a) 1/3+1/7 -2/4 =?
b) 3/6+4/6 -1/6 =?
c) 1/5-2/3 +1/7=?
d)1/7×2/3=?
e) 3/5×2/3=?
f) 1/3____=1/3×4/2
2/4 ?
g) 5/5___ =5/5×5/3
3/5 ?