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Exercise
1 efetue
A)(+5)+(+3)=
B)(+5)+(-3)=
C)(-5)+(+3)=
D)(-5)+(-3)=
E)-7+2=
F)-20-10=
G)6-10=
H)-300+400=
I)-317+200=
J)+45+44=
K)+42-39=