Question

Calculate the standard cell potential given the following standard reduction potentials:
Al3++3e−→Al;E∘=−1.66 V
Fe2++2e−→Fe;E∘=−0.440 V

Answer 1

You don't give enough information to know if you want the Eocell for a spontaneous or non-spontaneous cell. I assume you want the spontaneous reaction.
Al(s) ==> Al^3+ + 3e Eo = +1.66
Fe^2+ + 2e ==> Fe(s) Eo = -0.440
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2Al + 3Fe^2+ ==> 2Al^3+ + 3Fe
Add Eo values to find Eocell.