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Chapter 10
L10-1 Notes:
Ratios
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Vocabulary
A ratio is a comparison of two numbers by division.
Vocabulary
A common way to express a ratio is as a fraction in simplest form also known as an equivalent ratio.
Write a RATIO in Simplest Form
Write the ratio that compares the number of footballs to the number of tennis balls.
On Your Own…
Write each ratio as a fraction in simplest form.
1. 3 drums to 18 trumpets
2. 8 gerbils to 36 pets
Vocabulary
A rate is a ratio of two measurements having different kinds of units.
A unit rate is a rate simplified to have a denominator of 1.
On Your Own…
Write each ratio as a unit rate.
1. $9 for 3 cases of soda
2. 25 meters in 2 seconds
Chapter 10
L10-2 Notes:
Solving Proportions
Vocabulary
Proportion is an equation that shows that two ratios are equivalent.
For two ratios to form a proportion, their cross products must be equal.
Solve a Proportion
When one value in a proportion is unknown, you can use cross products to solve the proportion.
1.
Solve a Proportion
2.
On Your Own..
Solve each proportion.
1.
2.
3.
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