Exploring Rational Expressions: Addition and Subtraction

The video tutorial covers the use of number lines to add and subtract integers. It begins with an introduction to number lines and their application in arithmetic operations. The tutorial provides detailed steps for adding and subtracting integers, followed by examples to illustrate these concepts. It also explains how to handle subtraction of negative numbers by converting them into addition. The session concludes with instructions for practice problems to reinforce learning.

What is the primary objective of this lesson?

• To study the history of mathematics

• To explore the properties of complex numbers

• To understand adding and subtracting integers on a number line

• To learn how to multiply and divide integers

How do you determine the direction to move on the number line when adding integers?

• Move right for negative numbers

• Always move left

• Move right for positive numbers

• Move left for positive numbers

How do you add integers on a number line?

• Place a dot and move left based on the second number

• Place a dot and move right based on the second number

• Only use positive numbers

• Ignore the second number

If you start at -10 and add 8, where do you end up on the number line?

• -2

• -18

• 18

• 2

What does -10 + 8 equal?

• 18

• 2

• -2

• -18

When subtracting a positive number, in which direction do you move on the number line?

• To the left

• Upwards

• Do not move

• To the right

What is the result of -7 - 2 on the number line?

• -9

• 9

• 5

• -5

If you start at -7 and subtract 2, where do you end up on the number line?

• -5

• 9

• 5

• -9

What does subtracting a negative number effectively become?

• Multiplication

• Division

• Subtraction

• Addition

What is the result of 5 minus (-4)?

• 1

• -1

• 9

• -9