Understanding Number Line Models for Addition

The video tutorial explains how to use number line models to understand addition. It introduces the concepts of addends and sum, and demonstrates these using two examples. The first example shows how to add 2 and 7 to get 9, while the second example illustrates adding 7 and 11 to reach 18. The tutorial emphasizes understanding the movement on the number line to identify addends and calculate the sum.

What are the two numbers being added in an addition problem called?

• Addends

• Factors

• Products

• Sum

In the first model, what does the blue arrow represent?

• The second addend

• The first addend

• The sum

• The difference

How many units does the red arrow move in the first model?

• 5 units

• 7 units

• 6 units

• 8 units

What is the sum in the first number line model?

• 18

• 11

• 9

• 7

In the second model, what is the starting point of the blue arrow?

• Seven

• Nine

• Zero

• Eighteen

What is the first addend in the second model?

• 18

• 2

• 7

• 11

Where does the red arrow end in the second model?

• At 7

• At 9

• At 11

• At 18

How many units does the red arrow move in the second model?

• 11 units

• 12 units

• 10 units

• 9 units

What is the sum in the second number line model?

• 7

• 9

• 11

• 18

What does the second model demonstrate about the number 7?

• 7 divided by 11 is 18

• 7 increased by 11 is 18

• 7 decreased by 11 is 18

• 7 multiplied by 11 is 18