Calcule o valor das expressões: a)-3+7+4=
b)1+(-4)+(-6)=
c)-10+20+(-8)=
d)(-3)+2+(-4)+(-6)=
e)0,6+1,2+(-1,75)=
f)2,8+(-1)+(-1,6)=
g)2+3+(-4/3)=


Me ajudem pffv é pra agora!
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