Introduction to Positive and Negative Numbers

Which of these is the negative number?

The statements are represented by the rational number -6?

• A) $6 profit

• B) 6 feet below sea level

• C) 6°C above 0°C

The rational number that expresses a loss of $25.30 is

• A) -$25.3

• B) +$25.3

• C) +$2.53

• D) -2.53

The Tonga Trench is at an elevation of 35,702 feet below sea level. The elevation of Tonga Trench can be expressed as a rational number as ____________

• + 35,702

• - 35,702

The residents of a village want to paint a sign that shows the elevation of their village relative to the sea. Their altimeter shows +2,100 feet. What should their signboard read?

• A) 2,100 feet above sea level

• B) 2,100 feet below sea level

• C) -2,100 feet above sea level

• D) +2,100 feet below sea level

Kate takes the elevator from the ground floor (which is labeled 0) to a floor three levels below the ground floor. Which number represents the floor where she gets off the elevator?

• A) +3

• B) +2

• D) -3

A bank uses positive numbers to represent deposits and negative numbers to represent withdrawals.

How would a bank represent a deposit of 126.40 dollars?

• A) 126.40 dollars

• B) -126.40 dollars

Royce has $15 with him and spends $12 to buy his favorite comics. He has $3 left, which he deposits in the bank. Which number will be entered in Royce's bank account statement?

• A) -$12

• B) -$3

• C) +$3

• D) $15

Ralph buys an antique vase for $400 and sells the vase for $600. How does he enter the profit or loss in his account book?

• A) -$200

• B) +$200

• C) +$400

• D) +$600

Sandy takes a day off once every 4 days, and Morgan takes a day off once every 10 days. Today, both of them have taken the day off. How many days will it be until they have their next day off together?

• A) 4 days

• B) 10 days

• C) 20 days

• D) 40 days