The given expression is:

$100 \div 4 (2+3)$

Step 1: Simplify the parentheses

First, solve the expression inside the parentheses: $2 + 3 = 5$

Step 2: Multiply and divide (following the order of operations)

Now, the expression becomes: $100 \div 4 \times 5$

Step 3: Apply the order of operations (PEMDAS/BODMAS)

According to the order of operations, you must divide and multiply from left to right: $100 \div 4 = 25$ $25 \times 5 = 125$

Final Answer:

$100 \div 4 (2+3) = 125$

Would you like more details or explanations about this?

Here are five related questions you might find useful:

1. What happens if you change the parentheses in a similar expression?
2. How does the order of operations affect calculations?
3. How would this expression change if multiplication came before division?
4. What if a negative sign is added to the expression?
5. Can you rewrite this expression using fractions?

Tip: Always handle parentheses first and work left to right for multiplication and division!