Ratios/rates/Measure

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the total quantity by the number of units. For example, if you have 60 miles in 2 hours, the unit rate is 60 miles ÷ 2 hours = 30 miles per hour.

Front

What is the formula to convert liters to milliliters?

Back

To convert liters to milliliters, multiply the number of liters by 1000. For example, 10 L = 10 x 1000 = 10000 ml.

Front

What is the ratio of boys to girls if there are 12 boys and 10 girls?

Back

The ratio of boys to girls is 12:10, which can be simplified to 6:5.

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor (GCD).

Front

What does it mean if a rate is expressed as 'per unit'?

Back

A rate expressed as 'per unit' indicates how much of one quantity corresponds to one unit of another quantity, such as miles per hour or cost per item.

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.

Front

What is the total number of animals if there are 4 birds and 6 snakes?

Back

The total number of animals is 4 + 6 = 10.

Front

How do you find the total cost of tickets if one adult ticket costs $12.50 and 20 tickets are sold?

Back

To find the total cost, multiply the cost of one ticket by the number of tickets: $12.50 x 20 = $250.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different kinds of quantities, such as speed (distance per time) or price (cost per item).