"Twice a number" means multiplying the number by 2. 

If the number is represented by a variable, say \( x \), then twice that number would be expressed as:

\[
2x
\]

Would you like to go into further detail or clarify anything?

Here are five related questions:
1. What is half of a number represented as?
2. If a number is multiplied by 3, what would it be called?
3. How would you express a number increased by 5?
4. What happens if you add twice a number to itself?
5. How would you write an equation if you know twice a number is equal to 10?

**Tip:** When interpreting mathematical expressions, using a variable to represent the unknown number helps simplify and solve equations.

Learn how to express 'twice a number' using algebraic methods. This explanation includes the concept of multiplication, variable representation, and simple algebraic expressions. Ideal for students in Grades 5-7.

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