Efetue as seguintes somas algebricas : a) +5+3=
b) -5+2=
c) -4-3=
d) -2-1=
e) +4-1=
f) +7+2=
g) -2-4=
h)-6+3=
i) -5-4=
b) -5+2=
c) -4-3=
d) -2-1=
e) +4-1=
f) +7+2=
g) -2-4=
h)-6+3=
i) -5-4=
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