Manipulate multiplication and division equations, and understand and apply the commutative property of multiplication

What this means, in plain words

Algebra uses a letter to stand in for a number that is not known yet.

Multiplication is repeated addition of equal groups. Division shares a total into equal groups, or works out how many groups fit.

Representing means showing the same maths another way, with objects, a picture or a bar model, so the structure becomes visible.