Question Video: Writing Algebraic Expressions | Nagwa Question Video: Writing Algebraic Expressions | Nagwa

Question Video: Writing Algebraic Expressions Mathematics • First Year of Preparatory School

Write an expression for double a number 𝑑.

01:11

Video Transcript

Write an expression for double a number 𝑑.

First, let’s think about the word “double.” What does “double” mean mathematically? If you have a double an amount, you have two times that amount. Our number is 𝑑. If we have double a number 𝑑, we have two times the number 𝑑. Two times can be written like this: two 𝑥. Bring down the 𝑑. So we have two times 𝑑.

And there’s one other way we can simplify this expression. When we’re multiplying a variable by a number, we don’t need the multiplication symbol. We write the two next to the 𝑑. And that means two times 𝑑. This expression represents double the number 𝑑, two times 𝑑.

Join Nagwa Classes

Attend live sessions on Nagwa Classes to boost your learning with guidance and advice from an expert teacher!

  • Interactive Sessions
  • Chat & Messaging
  • Realistic Exam Questions

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy