Unit cost

• Wiskunde
• WO
• Studiejaar 2

Good morning!

Schedule: 

• Learning goals 
• Last time
• Unit rates/cost
• Shopping activity 

Learning goals 

At the end of this lessons I can:

• Use rates to determine which product is cheaper
• Convert rates to unit rates

What did we do last time?

The mobile company charges $180 for an hour of service. How many dollars are customers charged per minute?

Unit rates

The mobile company charges $180 for an hour of service. How many dollars are customers charged per minute?

$180 per 60 minutes 

$3 per 1 minute

÷60 

÷60 

Unit cost 

Which apples are the cheapest? 

Think (1 min)             pair (1 min)                share  

Unit cost 

3.99 per 2.5 kg 

divide both by 2.5

1.60 per 1 kg 

2.49 per 1.5 kg 

divide both by 1.5

1.66 per 1 kg 

2.99 per 1 kg 

Unit cost 

3.99 per 2.5 kg 

divide both by 2.5

1.60 per 1 kg 

2.49 per 1.5 kg 

divide both by 1.5

1.66 per 1 kg 

2.99 per 1 kg 

Let's go shopping!

With your team, and in the given time, walk around the room

and compare the 2 advertised prices. Determine which the better buy is.

Show all math work. 

Homework

Finish the speedy animals worksheet