4)Aplique a Regra das operações entre frações e encontre as soluções.


a)2/8 + 1/7 =

b) (-3/4)+2/7 =

c)1/9×(-8/3)=

d)2/8 : 3/7 =

e)(-8/4)×(-6/3) =

F)(-1/5) + (-1/5) =
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