Mathematics Grade 7 15 min

Unit prices

Unit prices

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1

Introduction & Learning Objectives

Learning Objectives Define unit price and explain its importance in consumer decisions. Calculate the unit price of an item given its total price and quantity. Compare the unit prices of two or more items to determine the 'best buy'. Solve real-world problems involving unit price calculations, including those with different units of measurement. Apply their understanding of unit prices to make informed purchasing decisions in everyday scenarios. Explain how unit prices relate to ratios and rates. Ever stood in a store aisle wondering which size of your favorite snack is the better deal? 🤔 Let's unlock the secret to becoming a super smart shopper! In this lesson, you'll learn how to calculate and compare unit prices. This powerful skill will help you mak...
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Key Concepts & Vocabulary

TermDefinitionExample Unit PriceThe cost of a single unit of an item. It tells you how much you pay for one ounce, one pound, one liter, one item, etc.If a 10-ounce bag of chips costs $2.50, the unit price is $0.25 per ounce. Total PriceThe overall cost of a product or a group of products before any discounts or taxes are applied.A 2-liter bottle of soda costs $1.99. The total price is $1.99. QuantityThe amount or number of items, often measured in units like ounces, pounds, liters, grams, or individual counts.A carton contains 12 eggs. The quantity is 12 eggs. RateA ratio that compares two quantities measured in different units. Unit price is a specific type of rate.Driving 60 miles in 2 hours is a rate of 30 miles per hour. Best Buy / Best DealThe option among several choices that offer...
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Core Formulas

Unit Price Formula $\text{Unit Price} = \frac{\text{Total Price}}{\text{Quantity}}$ Use this formula to calculate the cost per single unit of an item. Always divide the total price by the quantity to find out how much one unit costs. Comparing Unit Prices for Best Buy $\text{Compare } \frac{\text{Price}_1}{\text{Quantity}_1} \text{ with } \frac{\text{Price}_2}{\text{Quantity}_2} \text{ and choose the lower unit price.}$ To find the best deal between two or more items, calculate the unit price for each item and then select the item with the smallest unit price. This means you're paying less per unit.

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Sample Practice Questions

Easy
What is the definition of 'unit price'?
A.The total price of all items in a shopping cart.
B.The cost for a single unit of an item, like one ounce or one pound.
C.The price of an item after a discount is applied.
D.The quantity of items you can buy for one dollar.
Easy
Which formula is used to calculate the unit price of an item?
A.Unit Price = Quantity / Total Price
B.Unit Price = Total Price × Quantity
C.Unit Price = Total Price / Quantity
D.Unit Price = Total Price - Quantity
Easy
A 12-pack of soda costs $6.00. What is the unit price per can of soda?
A.$2.00 per can
B.$0.50 per can
C.$6.00 per can
D.$0.72 per can

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