8.NS.1-2 Number System Review

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

Is √25 a rational number?

Back

Yes, √25 = 5, which is a rational number.

Front

What is the approximate value of √40?

Back

√40 is approximately 6.32, which is between the whole numbers 6 and 7.

Front

Which of the following numbers is rational: 0, √81, or π?

Back

0 and √81 (which equals 9) are rational numbers; π is not a rational number.

Front

What is the area of a square if the side length is 13 feet?

Back

The area of a square is calculated as side length squared, so the area is 13² = 169 square feet.

Front

What is the side length of a square with an area of 169 square feet?

Back

The side length is 13 feet, since √169 = 13.

Front

What are the two consecutive whole numbers between which √50 lies?

Back

√50 is approximately 7.07, so it lies between 7 and 8.

Front

Can you give an example of a number that is not rational?

Back

An example of a non-rational number is √2, which cannot be expressed as a fraction of two integers.

Front

What is the relationship between rational numbers and integers?

Back

All integers are rational numbers because they can be expressed as a fraction with a denominator of 1.

Front

What is the value of √324?

Back

√324 = 18, which is a rational number.