STAAR Review: 6.4B, 6.5B

Front

What is the concept of ratio in mathematics?

Back

A ratio is a comparison of two quantities by division. It shows how many times one value contains or is contained within the other.

Front

How do you calculate the percentage of a number?

Back

To calculate the percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 30% of 20, calculate 20 * 0.30 = 6.

Front

What is the definition of a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity. For example, if a car travels 150 miles in 3 hours, the unit rate is 50 miles per hour.

Front

How do you find the average (mean) of a set of numbers?

Back

To find the average, add all the numbers together and then divide by the total count of the numbers.

Front

What is the concept of equivalent fractions?

Back

Equivalent fractions are different fractions that represent the same value. For example, 1/2 and 2/4 are equivalent fractions.

Front

What is the formula for calculating area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width (Area = length × width).

Front

What is a proportion in mathematics?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator (top number) by the denominator (bottom number). For example, 1/4 = 0.25.

Front

What is the concept of probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1, or as a percentage.

Front

What is the definition of a variable in mathematics?

Back

A variable is a symbol used to represent an unknown value in mathematical expressions or equations.