G8-MATH-L1 Rational Numbers

What is a rational number?

• A number that can be expressed as a fraction p/q where p and q are integers and q ≠ 0
• A whole number
• A number that cannot be expressed as a fraction
• Any number that is positive

Which of the following operations is rational numbers closed under?

• Addition
• Division
• Subtraction
• All of the above

Is subtraction commutative for rational numbers?

• Yes
• No
• Only for positive numbers
• Only for negative numbers

What is the additive identity for rational numbers?

• 1
• 0
• -1
• None of the above

Which of the following statements is true about multiplication of rational numbers?

• It is commutative
• It is not associative
• It is closed under division
• None of the above

What is the negative of the rational number 3/4?

• -3/4
• 3/4
• 0
• 1/4

Which of the following is NOT a rational number?

• 1/2
• 0
• √2
• -3

If a = 2/3 and b = 4/5, what is a + b?

• 22/15
• 6/15
• 10/15
• 8/15

What is the product of -1/2 and 3/4?

• -3/8
• 3/8
• -3/2
• 1/2

Which of the following is true about the reciprocal of a rational number?

• It is always a whole number
• It is always a negative number
• It is the multiplicative inverse
• It is always zero