Exploring Illustrative Mathematics Grade 6 Unit 7 Lesson 5

The video tutorial covers the use of negative numbers in various contexts, such as financial transactions and inventory management. It begins with an introduction to negative numbers using a chart of activities that either earn or cost money. The lesson then moves to a concession stand scenario, analyzing items sold and bought, and interpreting negative and positive values. The tutorial continues with a vending machine example, explaining sales and refills. Finally, it summarizes the concepts and assigns homework to reinforce understanding.

What happens to the value in the chart when you buy something?

• It stays the same

• It becomes negative

• It becomes positive

• It doubles

Which activity results in a positive number in the chart?

• Petting a dog

• Buying a shirt

• Babysitting

• Buying lunch

What does a negative quantity indicate in the concession stand records?

• Items bought

• Items sold

• Items lost

• Items found

If the value of an item is negative, what does it mean?

• The item was free

• The item was bought

• The item was returned

• The item was sold

What does a positive number mean in the context of the vending machine?

• A sale

• A refill

• A malfunction

• A discount

What could a zero in the second column of the vending machine records indicate?

• No sales or refills

• Equal sales and refills

• Machine is broken

• Machine is full

What is the distance between -2.5 and 2.5 on a number line?

• 5 units

• 10 units

• 2.5 units

• 0 units

How would you represent a temperature decrease of 4 degrees?

• -4

• +4

• 4

• 0

If a climber ascends 550 feet, how would you represent this change?

• 550

• 0

• +550

• -550

What does it mean if a puppy gains 5 pounds?

• The puppy's weight stayed the same

• The puppy lost weight

• The puppy's weight increased

• The puppy's weight decreased