Understanding Subtracting Negatives with Counters

The video tutorial explains the concept of subtracting a negative number using colored counters. Yellow counters represent positive numbers, while red counters represent negative numbers. The tutorial demonstrates that subtracting a negative is equivalent to adding a positive by modeling the problem 3 - (-4) using counters. By introducing zero pairs, the tutorial shows how removing negative counters results in the same outcome as adding positive counters, concluding that 3 - (-4) equals 7.

What is the purpose of using colored counters in this example?

• To make the video more colorful

• To visually demonstrate mathematical concepts

• To confuse the students

• To replace numbers with colors

Tags

CCSS.7.NS.A.1B

In the problem 3 minus negative 4, how is positive three initially represented?

• With four red counters

• With four yellow counters

• With three yellow counters

• With three red counters

Tags

CCSS.7.NS.A.1B

Why do we introduce zero pairs in the example?

• To add more counters

• To remove yellow counters

• To confuse the students

• To facilitate the removal of red counters

Tags

CCSS.2.OA.A.1

What is the result of removing four red counters in the example?

• Seven yellow counters

• Three yellow counters

• Four red counters

• Zero counters

Tags

CCSS.2.OA.A.1

How many yellow counters are left after removing the red counters?

• Zero

• Four

• Seven

• Three

Tags

CCSS.7.NS.A.1B

What does the example demonstrate about subtracting a negative number?

• It is equivalent to subtracting a positive number

• It is equivalent to adding a positive number

• It is equivalent to subtracting zero

• It is equivalent to adding a negative number

Tags

CCSS.7.NS.A.1C

What is the final result of the operation 3 minus negative 4?

• Positive seven

• Positive three

• Zero

• Negative seven

Tags

CCSS.7.NS.A.1C