7th-Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If a/b = c/d, what is the cross product?

Back

The cross product is ad = bc.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Front

How can you express a ratio?

Back

A ratio can be expressed in three ways: as a fraction, with a colon (a:b), or in words (a to b).

Front

What is the relationship between ratios and proportions?

Back

Ratios are used to create proportions, which compare two ratios.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.

Front

How do you find a unit rate?

Back

To find a unit rate, divide the first quantity by the second quantity.

Front

What is an example of a real-world proportion?

Back

If a recipe calls for 2 cups of flour for every 3 cups of sugar, the ratio of flour to sugar is a proportion.