Oh ruby, how beautifully simple you make multiple returns….

def add_and_subtract(v1,v2)
   return (v1 + v2),(v1 - v2)
end

print "Input a number: "
in1 = gets.to_i
print "Input another number: "
in2 = gets.to_i

result = add_and_subtract(in1,in2)
print "#{in1} + #{in2} = #{result[0]}n"
print "#{in1} - #{in2} = #{result[1]}n"