8.NS.1-2 Number System Review

Front

What symbol should be used to compare -17.5 and -√121?

Back

< (less than)

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b ≠ 0.

Front

Is √25 a rational number?

Back

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

Front

What is the definition of a perfect square?

Back

A perfect square is an integer that is the square of another integer.

Front

What is the perfect square of 9?

Back

81 (since 9 x 9 = 81)

Front

How do you convert a repeating decimal to a fraction?

Back

Let x = the repeating decimal, multiply by a power of 10 to shift the decimal, then subtract to eliminate the repeating part.

Front

Convert 0.444... to a fraction.

Back

4/9

Front

What is the square root of 324?

Back

18 (since 18 x 18 = 324)

Front

What is the square root of 121?

Back

11 (since 11 x 11 = 121)

Front

What is the difference between rational and irrational numbers?

Back

Rational numbers can be expressed as fractions, while irrational numbers cannot be expressed as fractions.