Subtracting Integers: Models and Techniques

The video tutorial covers subtracting integers using models like counter chips and number lines. It begins with an introduction to counter chips, explaining the concept of zero pairs. Several examples are provided, demonstrating subtraction with both positive and negative integers. The tutorial emphasizes the importance of zero pairs and illustrates how subtraction differs from addition on number lines. The lesson concludes with a recap of the techniques discussed.

What does a yellow counter chip represent?

• Positive one

• Negative one

• Zero

• Positive two

What happens to the value when a zero pair is added?

• It doubles

• It remains the same

• It decreases by one

• It increases by one

In the example 6 - 5 using counter chips, what is the first step?

• Place 5 red chips

• Place 6 yellow chips

• Add zero pairs

• Subtract 5 yellow chips

When subtracting on a number line, what does the subtraction sign indicate?

• Move to the right

• Move to the left

• Stay at the same position

• Move in the opposite direction

If you have -1 and want to subtract 4 using counter chips, what should you do first?

• Remove 4 red chips

• Remove 4 yellow chips

• Add 4 zero pairs

• Add 4 yellow chips

In the example of subtracting -1 - 4 on a number line, where do you start?

• At -1

• At 4

• At -4

• At 0

When subtracting 3 - (-2) using counter chips, what is the result?

• 5 yellow chips

• 1 yellow chip

• 2 yellow chips

• 3 red chips

In the example 3 - (-2) on a number line, what is the final position?

• 3

• 5

• 7

• 1

What is the result of -5 - (-1) using counter chips?

• -5

• -6

• -3

• -4

What is the key takeaway when using counters for subtraction?

• Always use yellow chips

• Never use red chips

• Subtract the counters listed after the subtraction sign

• Always add zero pairs