📝 Practice Worksheets
🛠️ Related Tools
🔑 Key Concepts
- A unit rate compares a quantity to exactly one unit.
- Price per ounce tells how much 1 ounce costs.
- To compare different package sizes, divide price by size.
- The lowest unit price is usually the better buy.
💡 Main Idea
When packages have different sizes and prices, the total price alone does not tell you which item is the best deal. Finding the unit price, such as price per ounce, lets you compare each option fairly.
✏️ Worked Example
🧠 Math Vocabulary
- Rate: A comparison of two quantities with different units.
- Unit Rate: A rate that compares a quantity to 1 unit.
- Unit Price: The cost for 1 item, 1 ounce, 1 pound, or another single unit.
- Price Per Ounce: The cost of 1 ounce of a product.
- Best Value: The option that gives the lowest cost per unit when comparing prices.
📐 Unit Rate Rule
To find a unit price, divide the total price by the total amount.
\(\text{Unit Price}=\frac{\text{Total Price}}{\text{Number of Units}}\)
When comparing prices, the option with the lowest unit price is usually the best deal.
📚 What You Should Already Know
Students should know how to divide decimals, compare decimals, read tables, and understand that a rate compares two different units.
🚀 What Comes Next
After comparing unit prices, students can use unit rates to compare speeds, wages, recipes, constant rates, and other real-world proportional situations.
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