Exploring Number Composition and Decomposition

The video tutorial reviews place value models using unit cubes and rods. It explains how a single cube represents the value of one, while a rod, composed of 10 unit cubes, represents the value of ten. The tutorial demonstrates grouping unit cubes to form a value of ten and combining stacks and unit cubes to reach a total of 24. It concludes with a comparison of different values, emphasizing the difference between 24 and 42 using rods and unit cubes.

What does a single unit cube represent?

• 100

• 1

• 10

• 0

How many unit cubes make up a rod or long?

• 15

• 5

• 20

• 10

If you have 1 rod and 4 unit cubes, what number do they represent together?

• 104

• 24

• 14

• 40

What is the value of two rods combined?

• 22

• 2

• 20

• 200

How many unit cubes are needed to represent the number 42?

• 42 unit cubes

• 4 rods and 2 unit cubes

• 5 rods

• 2 rods and 4 unit cubes

Is the number 24 represented by two rods and four unit cubes?

• No

• Only with 24 unit cubes

• Yes

• Only with 2 unit cubes