Leandrosindeaux10go Leandrosindeaux10go Matemática Respondido 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=