Mastering strategies to multiply larger numbers

What does CRA stand for?

• Concrete – Rational – Algebra

• Concrete – Representational – Abstract

• Count – Repeat – Apply

• Concepts – Rules – Algorithms

Which of the following is an example of the Concrete stage?

• Drawing an area model for 36 × 24

• Solving 1,248 ÷ 24 with long division

• Using base-ten blocks to model 23 × 14

• Writing partial products in an open array

A student draws an open array to solve 36 × 24. Which stage of CRA are they using?

• Representational

• Abstract

• Algorithmic

• Concrete

A student uses the standard algorithm to solve 324 × 12. This represents which CRA stage?

• Concrete

• Representational

• Abstract

• Conceptual

The Concrete stage uses tools like base-ten blocks, while the Representational stage uses models such as arrays, and the Abstract stage uses the standard _____.

One benefit of CRA is that it builds _____ understanding before focusing on procedural fluency.