Math STAAR Review (8th)

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as a quantity of one. For example, if a car travels 60 miles in 1 hour, the unit rate is 60 miles per hour.

Front

How do you write 450,000 in scientific notation?

Back

450,000 in scientific notation is written as 4.5 x 10^5.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction or ratio of two integers. For example, √324 is a rational number because it equals 18.

Front

What does the equation 40x + 20 = 200 represent?

Back

This equation represents a situation where Mitch owed Jason $200, has already paid back $20, and pays back $40 per week. It calculates how many weeks it will take to pay back the remaining amount.

Front

What does a scale factor of less than one indicate?

Back

A scale factor of less than one indicates that the prime image will be a reduction of the pre-image.

Front

What is the formula for calculating unit rate?

Back

The formula for calculating unit rate is: Unit Rate = Total Quantity / Number of Units.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form. It is written as a product of a number between 1 and 10 and a power of 10.

Front

What is the square root of 324?

Back

The square root of 324 is 18.

Front

How do you solve the equation 40x + 20 = 200 for x?

Back

To solve for x, first subtract 20 from both sides to get 40x = 180. Then divide both sides by 40 to find x = 4.5.

Front

What is the difference between a prime image and a pre-image?

Back

A prime image is the result of a transformation applied to a pre-image. If the scale factor is less than one, the prime image is smaller than the pre-image.