Subtracting Integers on a Number Line

This video tutorial covers subtracting integers using a number line. It explains how moving right increases values and moving left decreases them. The lesson demonstrates modeling subtraction and addition on a number line, emphasizing the concept of adding the opposite. Practical examples illustrate these concepts, and the commutative property is discussed, highlighting its inapplicability to subtraction. The use of counters to model problems is also shown. The lesson concludes with a summary of key points.

What happens to the value of numbers as you move to the right on a number line?

• The value increases

• The value decreases

• The value stays the same

• The value becomes negative

If you start at zero and move six units to the right, then two units to the left, where do you end up?

• At 2

• At 6

• At 4

• At -2

How do you model adding a negative number on a number line?

• Move to the left

• Move to the right

• Stay at the same position

• Move up

What is the opposite of -2 on a number line?

• 0

• 4

• -2

• 2

How can you rewrite the subtraction -1 - 4?

• 1 - 4

• -1 + 4

• 1 + 4

• -1 + (-4)

What is the result of -6 - (-5)?

• -11

• 1

• -1

• 0

When subtracting a positive number, which direction does the arrow point on a number line?

• Up

• Down

• Right

• Left

What is the result of -4 - 3 using counters?

• -7

• 7

• -1

• 1

What does the commutative property state about addition?

• Order of addends matters

• Order of addends does not matter

• Addition is the same as subtraction

• Addition always results in a positive number

What is the additive inverse of 5?

• 5

• 10

• 0

• -5