The expression $100 \div 4(2+3)$ can be simplified step by step by following the order of operations (PEMDAS/BODMAS):

1. Parentheses first: $(2 + 3) = 5$. $100 \div 4(5)$

2. Division and multiplication (from left to right): $100 \div 4 = 25$ Now, multiply: $25 \times 5 = 125$

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

Would you like a more detailed explanation or have any questions?

Here are 5 related questions you might find interesting:

1. How would you solve $200 \div 5(3 + 2)$?
2. What happens if the division comes after the multiplication in an expression like this?
3. How do you solve $100 \div [4(2+3)]$ with the brackets?
4. What is the impact of changing parentheses to exponents in similar problems?
5. How do you interpret an expression if multiplication is implied, like $6(2+1)$?

Tip: When division and multiplication are next to each other, always solve them from left to right.