Mastering Addition and Subtraction of Positive & Negative Numbers

1. Sarah has $50 in her bank account. She withdraws $20 and then deposits $15. How much money does she have now?

• $25

• $30

• $50

• $45

2. A submarine is at a depth of 200 meters below sea level. It rises 50 meters and then descends another 30 meters. What is its current depth?

• 220 meters below sea level

• 200 meters below sea level

• 150 meters below sea level

• 180 meters below sea level

3. A temperature starts at 10 degrees Celsius. It drops by 15 degrees and then rises by 5 degrees. What is the final temperature?

• -5 degrees Celsius

• 0 degrees Celsius

• 5 degrees Celsius

• 10 degrees Celsius

4. A hiker is at an elevation of 300 meters above sea level. He descends 450 meters and then climbs back up 200 meters. What is his current elevation?

• 0 meters

• -50 meters

• 150 meters

• 100 meters

5. A bank account has a balance of -$30. If $50 is deposited, what is the new balance?

• $50

• -$20

• $20

• $30

6. The stock market index starts at 1200 points. It increases by 150 points and then decreases by 200 points. What is the final index value?

• 1100

• 1250

• 1300

• 1150

7. A car's fuel gauge shows -5 liters after using some fuel. If the car is refueled with 10 liters, what is the new fuel level?

• -10 liters

• 0 liters

• 5 liters

• 15 liters

8. A roller coaster starts at a height of 50 meters. It drops 70 meters and then rises 30 meters. What is its height now?

• 50 meters

• 20 meters

• 40 meters

• 30 meters

9. A temperature reading is -5 degrees. If the temperature increases by 12 degrees, what is the new temperature?

• 7 degrees

• 10 degrees

• 5 degrees

• -3 degrees

10. A bank account has a balance of $100. After a withdrawal of $150, what is the new balance?

• -50

• 0

• -100

• 100