Understanding Rational Numbers

What is a rational number?

• A rational number is a number that cannot be expressed as a fraction.

• A rational number is a number that can be expressed as a fraction a/b, where a and b are integers and b is not zero.

• A rational number is always an integer.

• A rational number is a number with an infinite decimal representation.

Can you give an example of a rational number?

• 1/2

• sqrt(2)

• -2

• 3/4

Is the number 0.75 a rational number? Why or why not?

• No, 0.75 is an irrational number.

• Yes, 0.75 is a rational number.

• No, 0.75 is a whole number.

• Yes, 0.75 cannot be expressed as a fraction.

What is the difference between a rational number and an irrational number?

• Rational numbers are always whole numbers; irrational numbers can be fractions.

• Irrational numbers can be expressed as decimals; rational numbers cannot.

• Rational numbers can be expressed as fractions; irrational numbers cannot.

• Rational numbers are infinite; irrational numbers are finite.

How can you express the fraction 3/4 as a decimal?

• 1.5

• 0.5

• 0.75

• 0.25

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