Proportions Bellringer

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 two ratios and set the products equal to each other.

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

If a recipe calls for a ratio of 2:1 for sugar to flour, how much flour is needed for 4 cups of sugar?

Back

2 cups of flour.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Front

If a car travels 60 miles in 1 hour, what is its speed in miles per minute?

Back

1 mile per minute.

Front

How do you convert ounces to gallons?

Back

To convert ounces to gallons, divide the number of ounces by 128.

Front

If 1 cm on a map represents 10 km, how many kilometers does 5 cm represent?

Back

50 km.

Front

What is the relationship between distance, rate, and time?

Back

Distance = Rate × Time.

Front

If a bird flies 20 meters in 10 seconds, what is its speed in meters per second?

Back

2 meters per second.