Answer
$3$
Work Step by Step
Solve using PEMDAS (The priority list for solving expressions: Parentheses, exponents, [multiplication, division], [addition, subtraction]. For the operations in the brackets, solve from left to right)
$10 \div 2 + 3^3\cdot 2 - 20 = 10 \div 2 + 9\cdot 2 - 20 = 5+18-20 = 3$