Question

Efetue 85-(-5)²+3¹+4º+2-¹

Answer 1

     $85 - (-5)^2+3^1+4^0 + 2^{-1} \\ \\ =85 - 25+3+1+ \frac{1}{2} \\ \\ =64+ \frac{1}{2} \\ \\ = 64 \frac{1}{2} \\ \\ =64,5$