Unit Rates & Proportions
Flashcard
•
Mathematics
•
7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a unit rate?
Back
A unit rate is a comparison of two different quantities when they are combined together. It expresses how many units of one quantity correspond to one unit of another quantity.
2.
FLASHCARD QUESTION
Front
How do you calculate a unit rate?
Back
To calculate a unit rate, divide the total quantity of one item by the total quantity of another item. For example, if a car travels 440 miles in 8 hours, the unit rate is 440 miles ÷ 8 hours = 55 miles per hour.
3.
FLASHCARD QUESTION
Front
What is a proportion?
Back
A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.
4.
FLASHCARD QUESTION
Front
How do you solve a proportion?
Back
To solve a proportion, cross-multiply the terms and set the products equal to each other. For example, if a/b = c/d, then ad = bc.
5.
FLASHCARD QUESTION
Front
If Izzy drinks 8 glasses of water a day, how many glasses will she drink in 2 weeks?
Back
Izzy will drink 8 glasses/day × 14 days = 112 glasses in 2 weeks.
6.
FLASHCARD QUESTION
Front
What is the better buy: a 12 pack of Coke for $3.50 or a 6 pack for $1.80?
Back
The better buy is the 12 pack of Coke, which costs about $0.29 per can compared to $0.30 per can for the 6 pack.
7.
FLASHCARD QUESTION
Front
How do you determine the better value between two products?
Back
To determine the better value, calculate the unit price for each product (price per unit) and compare them. The lower unit price indicates the better value.
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