Grocery Shopping Math – Financial Literacy Grades 5-8 Price Comparison
- Grades
- Grades 5–8, Elementary, Middle School
- Pages
- 6
- File type
- Answer key
- Included
- Subject
- Special Resources, Life Studies, Life Skills, Math, Percentages, Decimals, Money, Multiplication and Division, Multiplication, Home Economics
- Topic
- money math, financial literacy
- Resource types
- Worksheets & Printables, Word Problems, Activities, Worksheets
- Answer key
- Included
About this resource
What's inside this resource
Grocery shelves give students real practice with unit price. Page 1 of this comparison shopping worksheet shows how to divide the price you pay by the number of units, with a bagel example, and decodes three common deals: buy 2 get 1 free, a percent off and a store-card discount. A three-item warm-up follows, with eggs, potatoes and juice boxes.
Across the next three pages, students compare offers on rice, yogurt cups, spaghetti and laundry soap by price per pound, cup or load, working out each deal first. Along the way they explain a shopper's mistake about a lower price tag, weigh bus fare against a cheaper store across town, check whether a smaller cracker box at the same price is really the same deal, invent an offer that beats two granola bar prices and write a tip for a friend who thinks the biggest package always wins.
- Grades 5–8 money math: eight numbered problems over four student pages
- Key and notes: worked unit prices, mistakes to watch for, discussion prompts, and support and challenge ideas
- Color or black and white: pick the copy that suits your printer
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In the classroom
Teaching tips & learning objectives
Learning objectives
Calculate unit prices and round to the nearest cent
Find the price paid after a buy-2-get-1-free deal, a percent discount or a store-card discount
Compare two or three offers to choose the best buy
Teaching tips
Go over the deal decoder on page 1 before students start, since four of the comparisons include a discount
Use the rice problem to talk about why comparing price tags alone can mislead a shopper
Check the Mistakes to watch for card in the key before grading the deal problems
Skills covered
Unit price: students divide the price paid by the number of ounces, pounds, cups, loads or items.
Discounts: students work out buy-2-get-1-free, percent-off and store-card prices before dividing.
Consumer reasoning: students spot a smaller package sold at the same price and weigh travel cost against a lower shelf price.
Good to know
Questions teachers ask about this resource
What kinds of deals do students work with?
Buy 2, get 1 free; a percent off the price; and a store-card amount off. Page 1 shows how to find the price paid for each one before dividing.
Do students need calculators?
The problems involve dividing money amounts and rounding to the nearest cent, so a calculator is helpful for many students. Each problem has a work box for showing the steps.
Is there more than computing unit prices?
Yes. Students also explain a shopper's mistake, factor in bus fare, compare a smaller box at the same price, create a better deal and write a shopping tip.
Is an answer key included?
Yes. Two teacher pages give the unit prices and best buys, sample written answers, mistakes to watch for and support and challenge ideas.
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Curriculum
Standards, concepts & topics
Standards
Standards
- 6.RP.A.3 — Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations. a. Make tables of equivalent ratios relating quantities with whole-number measurements, find missing values in the tables, and plot the pairs of values on the coordinate plane. Use tables to compare ratios. b. Solve unit rate problems including those involving unit pricing and constant speed. For example, if it took 7 hours to mow 4 lawns, then at that rate, how many lawns could be mowed in 35 hours? At what rate were lawns being mowed? c. Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percent. d. Use ratio reasoning to convert measurement units; manipulate and transform units appropriately when multiplying or dividing quantities.
- 6.RP.A.2 — Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of sugar.” “We paid $75 for 15 hamburgers, which is a rate of $5 per hamburger.”1
- 7.RP.A.3 — Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.
Core concepts
Core concepts
unit price
comparison shopping
discounts
financial literacy
best buy
Topics
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