Mastering Rational Numbers

What is a rational number?

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

• A rational number is always an integer.

• 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.

Identify the rational numbers from the following: 1/2, √2, -3, 0.75

• 1/2, -3, 0.75

• 3.5

• √2

• -1

Which of the following is not a rational number: 5, -1/3, π, 0.2?

• π

• -2

• 0.5

• 3.14

Add the rational numbers 1/4 and 3/4.

• 1

• 1/2

• 2

• 3/4

What is the sum of -2/5 and 3/5?

• 1/5

• -1/5

• 2/5

• 3/2

Subtract 1/2 from 3/4. What is the result?

• 1/4

• 1/2

• 3/4

• 1/3

What is -5/6 - 1/3?

• -5/3

• -7/6

• -1/2

• -4/6

Multiply the rational numbers 2/3 and 3/4.

• 1/2

• 3/4

• 1/4

• 5/6

What is the product of -1/2 and 4/5?

• -2/5

• 2/5

• -4/5

• 1/5

Divide 3/4 by 1/2. What is the answer?

• 3/2

• 1/3

• 2/3

• 1/4