Ratios and rates
8 videos
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Pre-algebra - Ratios and Rates: Why They're Everywhere
Learn the difference between ratios and rates with real-world examples like social media likes, hourly wages, and unit rates.
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Pre-algebra - What Is a Ratio?
Learn what ratios are and how to write them using a playlist example. Discover why order matters when comparing two quantities with ratios.
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Pre-algebra - Part-to-Whole Ratios
Learn the difference between part-to-part and part-to-whole ratios using a gym class example with 3 girls and 7 boys, and how to express them as fractions.
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Pre-algebra - Equivalent Ratios Explained
Learn what equivalent ratios are and how to create them by multiplying or dividing both parts by the same number, illustrated with lemonade and number line examples.
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Pre-algebra - Solving Ratio Word Problems Step by Step
Learn how to scale ratios by multiplying both parts by the same number. Uses a lemonade recipe example to demonstrate equivalent ratios and common mistakes.
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Pre-algebra - What Is a Rate? (And What's a Unit Rate?)
Learn what rates and unit rates are, how to calculate them by dividing, and how they make comparing quantities like speed easy and straightforward.
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Pre-algebra - Solving Rate Problems: Find the Unit Rate First
Learn to solve rate problems by finding the unit rate first, then scaling it. Uses a lemonade stand example to demonstrate calculating cups sold over different time periods.
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Pre-algebra - Comparing Rates: Which Is the Better Deal?
Learn how to compare unit rates to find the best deal by converting prices to cost per pack. A practical math lesson on ratios and rates using a shopping example.