Adding Positive and Negative Numbers

This video tutorial teaches how to add positive and negative numbers using a number line. It begins with an introduction to the concept, followed by examples demonstrating the process. The commutative property of addition is also explored, showing that the order of numbers does not affect the sum. The video concludes with a summary of the key points covered.

What is the starting point on a number line when adding positive and negative numbers?

• The largest number

• One

• The smallest number

• Zero

In the first example, what is the result of adding -0.5 and 1.5 using a number line?

• 0

• 1

• 2

• -1

When adding -0.5 and 1.5, which direction do you move first on the number line?

• Right

• Left

• Up

• Down

In the second example, what is the result of adding -2.1 and 4.2 using a number line?

• 2.0

• 1.1

• 2.1

• 3.1

How many units to the right do you move when adding 4.2 in the second example?

• 1.2 units

• 3.2 units

• 4.2 units

• 2.1 units

What property is demonstrated by changing the order of numbers in addition?

• Associative Property

• Distributive Property

• Identity Property

• Commutative Property

In the commutative property example, what is the result of 4.2 plus -2.1?

• 1.1

• 2.1

• 2.0

• 3.1

When revisiting the first example, what is the result of 1.5 plus -0.5?

• 0

• 1

• 2

• -1

What is the significance of the commutative property in addition?

• It only applies to negative numbers

• It only applies to positive numbers

• It allows numbers to be added in any order

• It changes the result

What is the final result of adding -0.5 and 1.5 using the commutative property?

• 0

• 1

• 2

• -1