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Money basics

Lesson 12 · Written for kid, teen, and little

The Price of Just One

Divide the price by how many you get to find the cost of one.

The idea

The price on the tag only tells you what the whole package costs, not whether it is a good deal. To compare fairly, divide the price by how many you get, and that gives you the unit price, the cost of just one. A bigger package is often cheaper per unit, but not always, so it is worth checking. And the cheapest unit price is only a real bargain if you will actually use the whole thing ⚖️

A

Words to know

5

Unit

One single item, or one ounce, or one pound of something. One granola bar out of a box of six is a unit.

Unit price

What one unit costs, found by dividing the price by how many you get. A $6 box of 6 bars is $1 a bar.

Quantity

How many you get in the package. A box of 12 has a quantity of 12.

Total price

The price on the tag for the whole package. The $6 on the box of granola bars.

Deal

A purchase where you get more for each dollar you spend. 12 bars for $9 beats 6 bars for $6, because that is $0.75 a bar instead of $1.

Try it — no accountSort into groups

Some shelf labels tell you what one unit costs. Others only give the whole package price.

Sort each label into the right group.

0 / 6 sorted

In the full lesson

  1. 1Sort into groups
  2. 2Work out the number
  3. 3Make the call

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