8th Grade Math STAAR practice

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

Define a prime number.

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b): a² + b² = c².

Front

How do you calculate the mean of a set of numbers?

Back

Mean = (Sum of all values) / (Number of values)

Front

What is the difference between the median and the mode?

Back

Median is the middle value in a data set when arranged in order; mode is the value that appears most frequently.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac.

Front

What is a linear equation?

Back

A linear equation is an equation that makes a straight line when graphed. It has the form y = mx + b.

Front

Define a variable in mathematics.

Back

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

Front

What is the greatest common factor (GCF)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

What is the least common multiple (LCM)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of all of them.