Ratios, Unit Rate, Double Number Line Percents intro

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 find the unit rate, divide the quantity by the number of units. For example, if 4 apples cost $2, the unit rate is $2 ÷ 4 = $0.50 per apple.

Front

What is a double number line?

Back

A double number line is a visual representation that shows two related quantities along two parallel lines, helping to illustrate ratios and relationships between them.

Front

If 8 juice boxes cost $4.79, what is the cost per juice box?

Back

The cost per juice box is $4.79 ÷ 8 = $0.59875, or approximately $0.60.

Front

What is the better buy: 8 juice boxes for $4.79 or 12 juice boxes for $6.59?

Back

The better buy is the 12 pack, as it costs approximately $0.55 per juice box compared to $0.60 for the 8 pack.

Front

If the ratio of red paint to yellow paint is 1:2, how many teaspoons of yellow paint are in 4 batches?

Back

In 4 batches, there are 8 teaspoons of yellow paint (4 batches x 2 teaspoons of yellow paint per batch).

Front

What is the next pair in the double number line if Sugar: 8 and Flour: 12?

Back

The next pair is Sugar: 12 and Flour: 18, maintaining the same ratio.

Front

If Kim makes 8 loaves of bread and uses 12 cups of raisins, how many cups of raisins does she use for 4 loaves?

Back

For 4 loaves, she uses 6 cups of raisins (12 cups ÷ 8 loaves x 4 loaves).

Front

If 9 avocados cost $5, how much do 18 avocados cost?

Back

18 avocados cost $10 (since 18 is double 9, the cost also doubles).

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100, often used to compare relative sizes.