Exploring Subtracting Negatives with Color 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 example problem, three minus negative four, is demonstrated by modeling positive three with yellow counters and introducing zero pairs to remove red counters. This shows that subtracting a negative is equivalent to adding a positive, resulting in a final count of positive seven.

What color counter represents a positive one?

• Yellow

• Red

• Green

• Blue

What is the value of one yellow counter and one red counter combined?

• Two

• Zero

• Negative one

• One

Tags

CCSS.7.NS.A.1A

How do we model positive three using counters?

• Three yellow counters

• Four yellow counters

• Three red counters

• Two yellow and one red counter

Tags

CCSS.7.NS.A.1C

What does 'minus negative four' mean in terms of counters?

• Add four red counters

• Remove four red counters

• Remove four yellow counters

• Add four yellow counters

Tags

CCSS.7.NS.A.1B

What do we need to introduce if we don't have enough red counters to remove?

• Negative numbers

• More yellow counters

• Zeros

• More red counters

Tags

CCSS.7.NS.A.1C

What is the result of introducing four yellow and four red counters?

• Positive four

• Positive eight

• Zero

• Negative four

Tags

CCSS.7.NS.A.1C

After removing four red counters, how many yellow counters are left?

• Four

• Three

• Zero

• Seven

Tags

CCSS.2.OA.A.1

What is the equivalent operation to subtracting a negative?

• Subtracting a positive

• Adding a negative

• Adding a positive

• Multiplying by a negative

Tags

CCSS.7.NS.A.1C