Rational Numbers and Operations Quiz

Which set of numbers includes positive whole numbers?

• Natural numbers

• Rational numbers

• Integers

• Fractions

Answer explanation

Positive whole numbers are also known as natural numbers. Therefore, the correct set of numbers that includes positive whole numbers is the set of natural numbers.

What is the result when adding two numbers with the same signs?

• Add the absolute values and keep the sign

• Subtract the absolute values and keep the sign

• Multiply the absolute values and keep the sign

• Divide the absolute values and keep the sign

Answer explanation

When adding two numbers with the same signs, you add their absolute values and keep the sign.

What is the result when subtracting two numbers?

• Multiply the absolute values and keep the sign

• Divide the absolute values and keep the sign

• Add the absolute values and keep the sign

• Subtract the absolute values and keep the sign

Answer explanation

When subtracting two numbers, you subtract the absolute values and keep the sign.

What is the result when multiplying two numbers with different signs?

• Positive

• Undefined

• Zero

• Negative

Answer explanation

When multiplying two numbers with different signs, the result is always negative. This is because a positive number multiplied by a negative number or a negative number multiplied by a positive number always gives a negative result.

What is the result when dividing a negative number by a positive number?

• Undefined

• Zero

• Negative

• Positive

Answer explanation

When dividing a negative number by a positive number, the result is always negative. This is because dividing a negative number by a positive number is equivalent to multiplying the negative number by the reciprocal of the positive number, which results in a negative value.

What is the total amount that Dan paid for four shirts and a delivery fee?

• $137.21

• $137.25

• $129.96

• $137.96

Answer explanation

The total amount that Dan paid for four shirts and a delivery fee is $137.21, which is the correct choice.

How much more border does Mrs. Jones need to decorate the bulletin board?

• 5 and 1/2 feet

• 7 and 3/4 feet

• 16 and 1/2 feet

• 11 and 1/4 feet

Answer explanation

Mrs. Jones needs 11 and 1/4 feet more border to decorate the bulletin board. This is the correct choice.

How many square feet will Christy be able to cover with 2 and 1/5 gallons of paint?

• 24.65 square feet

• 360.5 square feet

• None of the above

• 793.1 square feet

Answer explanation

Christy will be able to cover 793.1 square feet with 2 and 1/5 gallons of paint, which is the correct answer choice.

What is the value of 24.65 divided by -8.5?

• 3.9

• -2.9

• 2.9

• -3.9

Answer explanation

The value of 24.65 divided by -8.5 is -2.9. This is the correct choice because it matches the given correct answer.

What is the result when subtracting a positive number from a negative number?

• Subtract the absolute values and keep the sign

• Add the absolute values and keep the sign

• Multiply the absolute values and keep the sign

• Divide the absolute values and keep the sign

Answer explanation

When subtracting a positive number from a negative number, you add the absolute values and keep the sign.