Subtracting Integers Using Counters

This lesson teaches how to represent integer subtraction using counters. It covers subtracting negative integers, using zero pairs to handle cases where more counters are needed, and subtracting positive integers. The concept of zero pairs, which are groups of one positive and one negative counter, is introduced to facilitate subtraction without changing the value of the original number. The lesson concludes with a summary of these techniques.

What is the result of subtracting negative 2 from negative 3 using counters?

• Negative 5

• Negative 1

• Zero

• Positive 1

When subtracting negative 5 from negative 3, how many zero pairs are needed to perform the subtraction?

• 3 zero pairs

• 4 zero pairs

• 1 zero pair

• 2 zero pairs

What is the final result when subtracting negative 5 from negative 3 using zero pairs?

• Negative 8

• Positive 5

• Positive 2

• Negative 2

How many zero pairs are added when subtracting positive 5 from negative 4?

• 6 zero pairs

• 3 zero pairs

• 5 zero pairs

• 4 zero pairs

What is the result of subtracting positive 5 from negative 4 using counters?

• Negative 9

• Negative 1

• Positive 1

• Zero