Algebraic expressions

What you'll learn

1. 1

   Think of a box of chocolates 🍫. You know there are 4 chocolates inside, but the box is taped shut — you can't see them yet!

2. 2

   If one box has x chocolates, what does 2 boxes mean?

3. 3

   Drag chocolates to make 3 boxes of x — that's 3x.

4. 4

   Let's find what 2x + 3 means when x = 5.

5. 5

   If x = 4, what is 3x + 2?

6. 6

   Now build 4x + 1 using boxes of x. If x = 3, how many chocolates total?

7. 7

   What does 5x mean when x = 2?