In questions 3-6 , use your understanding of order 3. (43-20)-2cdot 5

To solve the expression , we need to follow the order of operations, which is Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).Step 1: Parentheses Step 2: Multiplication Step 3: Subtraction Therefore, the answer is 13.