Caucule o valor das expressoes,apresentando o resultadona forma de fraçao irredutivel : VALE 45 PONTOS
os que estao assim exemplo89/56 sao fraçoes
a)o,5+1/4vezes1/3
b)1/2+1/3 : 5/6
e)(3+1/2) vezes4/5
c)1/4vezes0,5+1/2 d) 15 : (3/4 vezes 1/4)
f)(0,75vezes 1/4 :2/5 + 1/2
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