The given expression is:

$2 - 1 + 9 \times 6$

Step-by-step solution:

1. Apply the order of operations (PEMDAS/BODMAS):

   • Multiplication comes before addition and subtraction.

2. First, calculate $9 \times 6$: $9 \times 6 = 54$

3. Now substitute this back into the expression: $2 - 1 + 54$

4. Next, perform the subtraction and addition from left to right: $2 - 1 = 1$ Then: $1 + 54 = 55$

Final Answer:

$2 - 1 + 9 \times 6 = 55$

Would you like more details or have any questions?

Here are some related questions you might consider:

1. What are the rules of order of operations (PEMDAS/BODMAS)?
2. How would the answer change if parentheses were introduced in the expression?
3. What is the difference between multiplication and division in terms of priority?
4. How do we handle more complex expressions with exponents and roots?
5. Can you explore why the multiplication takes precedence over addition?

Tip: Always remember to perform multiplication and division before addition and subtraction in any expression.