Writing proportions

Front

What is a proportion?

Back

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

Tags

CCSS.7.RP.A.2A

Front

How do you write a proportion using variables?

Back

Front

What is the cross-multiplication method in proportions?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio, leading to the equation: a * d = b * c.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the relationship between ratios and proportions?

Back

Ratios can form proportions when two ratios are equivalent.

Tags

CCSS.6.RP.A.3A

Front

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

Back

The ratio of flour to sugar is 2:3.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find an unknown in a proportion?

Back

To find an unknown in a proportion, set up the proportion and use cross-multiplication to solve for the unknown.

Tags

CCSS.7.RP.A.2B

Front

What is the simplified ratio of 10 to 15?

Back

The simplified ratio of 10 to 15 is 2:3.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a car travels 60 miles in 1 hour, what is the unit rate?

Back

The unit rate is 60 miles per hour.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2