Let's analyze the given options to determine which expressions equal 260.

1. 23 × 10 = 230 → Not equal to 260.
2. 20 × 10 + 3 × 10
   $(20 \times 10) = 200$
   $(3 \times 10) = 30$
   $200 + 30 = 230$ → Not equal to 260.
3. 13 × 20 = 260 → This is equal to 260.
4. 1 × 20 + 3 × 20
   $(1 \times 20) = 20$
   $(3 \times 20) = 60$
   $20 + 60 = 80$ → Not equal to 260.
5. 10 × 20 + 3 × 20
   $(10 \times 20) = 200$
   $(3 \times 20) = 60$
   $200 + 60 = 260$ → This is equal to 260.

Correct answers:

• 13 × 20
• 10 × 20 + 3 × 20

Would you like further clarification or details on any part of this problem?

Here are 5 related questions:

1. How can you simplify multiplication involving addition or subtraction?
2. What are the properties of multiplication that make solving these expressions easier?
3. What other numbers could multiply to get 260?
4. How do you determine if an expression is equal to a given number quickly?
5. Can expressions involving parentheses give different results?

Tip: Always perform calculations step by step, especially with combined operations like multiplication and addition, to avoid errors.