Grade 6 Math Book · Money & Measurement
The Toothpaste Millionaire
by Jean Merrill
Sixth-grader Rufus Mayflower thinks toothpaste costs too much, so he makes his own for a few cents a tube. With his friend Kate, he turns the idea into a booming business.
Why it's useful
A funny chapter book full of real business math.
- Unit cost and pricing. Rufus works out what each tube costs to make.
- Profit. The kids figure out how to earn money and grow the business.
- Math in class. The class even helps solve the company's math problems.
Try it in class or at home
- Cost per tube. Work out the cost of one tube from the ingredient prices.
- Price it. Set a price and calculate profit for 100, 1,000 and 10,000 tubes.
- Your own business. Plan a simple product, its costs and its price.