Understanding the CRA Method in Math

The video tutorial explains the CRA (Concrete, Representational, Abstract) approach to teaching multiplication and division of decimals. It begins with an introduction to CRA, followed by a detailed explanation of each stage. The concrete stage uses base ten blocks, the representational stage involves drawing, and the abstract stage focuses on using numbers. The tutorial provides examples of multiplying decimals using these stages, emphasizing the transition from concrete to abstract understanding.

What does CRA stand for in the context of teaching mathematics?

• Concrete, Realistic, Abstract

• Concrete, Representation, Abstract

• Conceptual, Realistic, Abstract

• Calculate, Represent, Analyze

Which tool is used in the concrete stage of CRA to teach decimal multiplication?

• Algebra tiles

• Fraction strips

• Base ten blocks

• Number lines

What is the purpose of using virtual manipulatives in the concrete stage?

• To simplify the learning process

• To avoid using any physical tools

• To make learning more abstract

• To replace physical objects with digital ones

In the pictorial stage, what does the rectangle represent when multiplying decimals?

• The sum of the decimals

• The product of the decimals

• The quotient of the decimals

• The difference between the decimals

How many small squares are there in the pictorial representation of 0.6 x 0.4?

• 24

• 36

• 16

• 48

What is the result of multiplying 1.6 by 0.4 using the CRA method?

• 0.94

• 0.64

• 1.04

• 0.84

In the advanced example, what is the first step in breaking down 3.4 x 1.7?

• Multiply 4 by 7

• Multiply 3 by 1

• Multiply 3 by 7

• Multiply 4 by 1

What is the area of the rectangle formed by multiplying 3 by 1 in the advanced example?

• 7

• 1

• 3

• 4

How is the area of 7/10 by 4/10 represented in the advanced example?

• 28 thousandths

• 28 hundredths

• 28 tenths

• 28 units

What is the final result of multiplying 3.4 by 1.7 using the CRA method?

• 5.68

• 5.78

• 5.88

• 5.98